{"id":4132,"date":"2026-09-03T05:19:55","date_gmt":"2026-09-03T05:19:55","guid":{"rendered":"https:\/\/www.henghuahose.com\/?post_type=product&#038;p=4132"},"modified":"2026-09-03T05:19:57","modified_gmt":"2026-09-03T05:19:57","slug":"bsp-male-o-ring-seal-fitting-12211-series","status":"publish","type":"product","link":"https:\/\/www.henghuahose.com\/pt\/product\/bsp-male-o-ring-seal-fitting-12211-series\/","title":{"rendered":"BSP Male O-Ring Seal Fitting: 12211 Series"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-4134 size-full\" src=\"https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/09\/bsp-male-o-ring-seal-fitting-12211-series-spec.jpg\" alt=\"bsp male o ring seal fitting 12211 series spec\" width=\"750\" height=\"378\" srcset=\"https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/09\/bsp-male-o-ring-seal-fitting-12211-series-spec.jpg 750w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/09\/bsp-male-o-ring-seal-fitting-12211-series-spec-300x151.jpg 300w, https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/09\/bsp-male-o-ring-seal-fitting-12211-series-spec-600x302.jpg 600w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/p>\n<h2>Why This BSP Male O-Ring Seal Fitting Passes the Compliance Gate<\/h2>\n<p>A BSP male O-ring seal fitting terminates a braided hydraulic hose in a male G-threaded stud that seals with an O-ring: the ring sits in a groove at the base of the thread and compresses between the flat hexagon shoulder and the flat face of the receiving BSPP port when the fitting is tightened. The 12211 series from HENGHUA covers 12 part numbers from -04 to -20 with G-series parallel threads from G1\/4&#8243; to G1.1\/4&#8243;. Every unit is cold-forged from carbon steel, heat-treated, plated, and 100% pressure tested before shipment. For OEM buyers this fitting is a compliance gate; for maintenance teams it is the male O-ring termination that seals positively on a flat port face without thread sealant.<\/p>\n<ul>\n<li><strong>O-ring at the thread base<\/strong>: the O-ring groove is machined at the base of the male thread, just before the flat hexagon shoulder. Tightening the fitting compresses the O-ring between the shoulder face and the flat face of the receiving BSPP port or fitting.<\/li>\n<li><strong>BSPP G thread<\/strong>: the thread is parallel (G series, ISO 228-1) and only holds the connection; the O-ring does the sealing. G threads must never be interchanged with BSPT taper threads, which seal by thread interference.<\/li>\n<li><strong>O-ring reference on every part number<\/strong>: each row in the table carries its O-ring code (O111 to O222), so the seal element is ordered with the fitting and never guessed in the workshop.<\/li>\n<li><strong>Braided hose executions<\/strong>: the part numbers in the table are for braided hose from -04 to -20; for spiral hose, change the series number to 12212 per the factory sheet.<\/li>\n<li><strong>OEM gate check<\/strong>: full dimensional and material conformance with G thread form per ISO 228-1, with material test reports (MTR) available for every batch.<\/li>\n<\/ul>\n<h3>Core Advantages<\/h3>\n<ol>\n<li><strong>Positive O-ring seal on a flat face<\/strong>: the compressed O-ring seals without thread sealant, tape, or a cone, which gives a clean, repeatable joint on BSPP flat-faced ports.<\/li>\n<li><strong>O-ring reference with every part number<\/strong>: the seal element code is in the ordering table, so the workshop fits the right ring the first time.<\/li>\n<li><strong>Replaceable seal element<\/strong>: service is a new O-ring, not a new fitting, which keeps maintenance cost low.<\/li>\n<li><strong>Twelve sizes, G1\/4&#8243; to G1.1\/4&#8243;<\/strong>: -04 to -20 covers the working range of BSP circuits, including the -12-16 combination for a 25 mm hose on a G3\/4&#8243; port.<\/li>\n<li><strong>96 to 1000 h salt spray options<\/strong>: trivalent zinc (96 h), zinc-nickel (720 h), or Dacromet (1000 h), matched to your environment.<\/li>\n<\/ol>\n<h2>Technical Specifications<\/h2>\n<h3>What Is This BSP Male O-Ring Seal Fitting?<\/h3>\n<p>This BSP male O-ring seal fitting terminates a braided hose in a male stud end that seals with an elastomer ring. The port end is a male parallel G thread (G series, thread form per ISO 228-1). At the base of the thread, immediately before the flat shoulder of the hexagon, there is a machined O-ring groove. When the fitting is tightened into a receiving BSPP female port or fitting whose face is flat, the O-ring is compressed between the flat shoulder of the fitting and the flat face of the port, and it does the sealing. The G thread is parallel and does not seal by interference; it only pulls the shoulder against the port face. This is why the fitting must never be paired with a BSPT taper thread, which seals by thread interference instead.<\/p>\n<p>The O-ring seal version is the soft-seal member of the BSPP male fitting family. Where the 60\u00b0 cone seat male version seals metal-to-metal on a cone, and the double use version offers a cone seat or a bonded washer, the O-ring version seals on an elastomer ring in a groove at the thread base. That gives two practical differences. First, the joint seals positively on a plain flat-faced port, which is the port style machined on many pumps, valves, and manifolds that use BSPP threads. Second, the service temperature and fluid compatibility of the joint follow the O-ring compound, not the steel, so the compound must be matched to your system. Send us your fluid and operating temperature and our engineers will confirm the compound before shipment.<\/p>\n<p>The 12211 is the straight member of the BSP male O-ring hose fitting family, complementing the 12241 (45\u00b0) and 12291 (90\u00b0) elbows on the same sealing geometry when they are added to the range. The single hexagon S1 sits between the threaded section and the hose tail, giving a solid wrenching point. The series covers 12 sizes from -04 to -20; the part numbers in the table are for braided hose, and for spiral hose the series number changes to 12212. The serrated hose tail is engineered for a crimped termination; confirm your exact hose construction with our engineers and the matching crimp data sheet is supplied with the order.<\/p>\n<h3>Dimensional Data and Threads<\/h3>\n<div>\n<div>\n<table>\n<thead>\n<tr>\n<th>Symbol<\/th>\n<th>Description<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>E<\/td>\n<td>BSPP male thread (G series, ISO 228-1), G1\/4&#8243; to G1.1\/4&#8243;<\/td>\n<\/tr>\n<tr>\n<td>A<\/td>\n<td>Overall length of the fitting, from the thread tip to the start of the hose stem<\/td>\n<\/tr>\n<tr>\n<td>C<\/td>\n<td>Length of the threaded section including the O-ring groove, ending at the hexagon<\/td>\n<\/tr>\n<tr>\n<td>S1<\/td>\n<td>Hex across flats, between the threaded section and the hose tail<\/td>\n<\/tr>\n<tr>\n<td>O-ring<\/td>\n<td>O-ring reference code for the row, as marked on the factory sheet<\/td>\n<\/tr>\n<tr>\n<td>Dash<\/td>\n<td>Hose inside diameter in 1\/16&#8243; increments (-04 to -20)<\/td>\n<\/tr>\n<tr>\n<td>DN<\/td>\n<td>Hose inside diameter in millimetres (6 to 32)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p>Full dimension drawings with A, C, and S1 callouts are supplied as PDF and CAD (STEP\/DWG) files. Because this is a crimp fitting, the two process-critical parameters are the hose insert depth and the crimp outside diameter; both are hose-series specific and are listed in the crimp data sheet that accompanies every order.<\/p>\n<h3>Full Dimension Table (Part Number Matrix) {#by-thread-size}<\/h3>\n<p>Read the table with your BSPP thread (E) and your hose size (dash). The part number is the order code; copy it directly into your inquiry or purchase order. The O-ring code in the same row is the seal element supplied with the fitting. The pattern is 12211-[thread dash]-[hose dash]: for example, 12211-12-12 has a G3\/4&#8243; thread and suits a -12 (20 mm) braided hose.<\/p>\n<div>\n<div>\n<table>\n<thead>\n<tr>\n<th>Part No.<\/th>\n<th>Thread E (BSPP)<\/th>\n<th>Hose I.D. DN (mm)<\/th>\n<th>Dash<\/th>\n<th>O-Ring<\/th>\n<th>A (mm)<\/th>\n<th>C (mm)<\/th>\n<th>S1 (mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>12211-04-04<\/td>\n<td>G1\/4&#8243;x19<\/td>\n<td>6<\/td>\n<td>04<\/td>\n<td>O111<\/td>\n<td>23.5<\/td>\n<td>11<\/td>\n<td>19<\/td>\n<\/tr>\n<tr>\n<td>12211-04-06<\/td>\n<td>G1\/4&#8243;x19<\/td>\n<td>10<\/td>\n<td>06<\/td>\n<td>O111<\/td>\n<td>23.5<\/td>\n<td>11<\/td>\n<td>19<\/td>\n<\/tr>\n<tr>\n<td>12211-06-06<\/td>\n<td>G3\/8&#8243;x19<\/td>\n<td>10<\/td>\n<td>06<\/td>\n<td>O113<\/td>\n<td>26.5<\/td>\n<td>12<\/td>\n<td>22<\/td>\n<\/tr>\n<tr>\n<td>12211-08-04<\/td>\n<td>G1\/2&#8243;x14<\/td>\n<td>6<\/td>\n<td>04<\/td>\n<td>O115<\/td>\n<td>33.5<\/td>\n<td>14<\/td>\n<td>27<\/td>\n<\/tr>\n<tr>\n<td>12211-08-06<\/td>\n<td>G1\/2&#8243;x14<\/td>\n<td>10<\/td>\n<td>06<\/td>\n<td>O115<\/td>\n<td>33.5<\/td>\n<td>14<\/td>\n<td>27<\/td>\n<\/tr>\n<tr>\n<td>12211-08-08<\/td>\n<td>G1\/2&#8243;x14<\/td>\n<td>12<\/td>\n<td>08<\/td>\n<td>O115<\/td>\n<td>34<\/td>\n<td>14<\/td>\n<td>27<\/td>\n<\/tr>\n<tr>\n<td>12211-10-10<\/td>\n<td>G5\/8&#8243;x14<\/td>\n<td>16<\/td>\n<td>10<\/td>\n<td>O910<\/td>\n<td>36<\/td>\n<td>15.5<\/td>\n<td>30<\/td>\n<\/tr>\n<tr>\n<td>12211-12-10<\/td>\n<td>G3\/4&#8243;x14<\/td>\n<td>16<\/td>\n<td>10<\/td>\n<td>O119<\/td>\n<td>33.5<\/td>\n<td>15.5<\/td>\n<td>32<\/td>\n<\/tr>\n<tr>\n<td>12211-12-12<\/td>\n<td>G3\/4&#8243;x14<\/td>\n<td>20<\/td>\n<td>12<\/td>\n<td>O119<\/td>\n<td>38<\/td>\n<td>15.5<\/td>\n<td>32<\/td>\n<\/tr>\n<tr>\n<td>12211-12-16<\/td>\n<td>G3\/4&#8243;x14<\/td>\n<td>25<\/td>\n<td>16<\/td>\n<td>O119<\/td>\n<td>36<\/td>\n<td>15.5<\/td>\n<td>32<\/td>\n<\/tr>\n<tr>\n<td>12211-16-16<\/td>\n<td>G1&#8243;x11<\/td>\n<td>25<\/td>\n<td>16<\/td>\n<td>O217<\/td>\n<td>44.5<\/td>\n<td>18.5<\/td>\n<td>41<\/td>\n<\/tr>\n<tr>\n<td>12211-20-20<\/td>\n<td>G1.1\/4&#8243;x11<\/td>\n<td>32<\/td>\n<td>20<\/td>\n<td>O222<\/td>\n<td>46<\/td>\n<td>20<\/td>\n<td>50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p>The part numbers shown are for the braided-hose version. For spiral hose, change the series number to 12212, whose stem is longer for the extra reinforcement layers.<\/p>\n<h3>Select by Hose Dash Size {#by-hose-size}<\/h3>\n<p>Match your hose bore first, then read the thread sizes available for that bore:<\/p>\n<div>\n<div>\n<table>\n<thead>\n<tr>\n<th>Hose Dash<\/th>\n<th>Hose I.D. (mm)<\/th>\n<th>Available BSPP Threads in the 12211 Series<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>-04<\/td>\n<td>6<\/td>\n<td>G1\/4&#8243;, G1\/2&#8243;<\/td>\n<\/tr>\n<tr>\n<td>-06<\/td>\n<td>10<\/td>\n<td>G1\/4&#8243;, G3\/8&#8243;, G1\/2&#8243;<\/td>\n<\/tr>\n<tr>\n<td>-08<\/td>\n<td>12<\/td>\n<td>G1\/2&#8243;<\/td>\n<\/tr>\n<tr>\n<td>-10<\/td>\n<td>16<\/td>\n<td>G5\/8&#8243;, G3\/4&#8243;<\/td>\n<\/tr>\n<tr>\n<td>-12<\/td>\n<td>20<\/td>\n<td>G3\/4&#8243;<\/td>\n<\/tr>\n<tr>\n<td>-16<\/td>\n<td>25<\/td>\n<td>G3\/4&#8243;, G1&#8243;<\/td>\n<\/tr>\n<tr>\n<td>-20<\/td>\n<td>32<\/td>\n<td>G1.1\/4&#8243;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<h3>Material and Heat Treatment<\/h3>\n<div>\n<div>\n<table>\n<thead>\n<tr>\n<th>Item<\/th>\n<th>Standard Option<\/th>\n<th>Premium Option<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Material<\/td>\n<td>High-strength cold-forged carbon steel (20#\/35#\/45#)<\/td>\n<td>Stainless steel 304 or 316L<\/td>\n<\/tr>\n<tr>\n<td>Heat treatment<\/td>\n<td>Carburizing and quenching, core hardness HRC 20-28<\/td>\n<td>Solution treatment, stable corrosion resistance<\/td>\n<\/tr>\n<tr>\n<td>Surface<\/td>\n<td>Trivalent zinc plating (96 h salt spray)<\/td>\n<td>Zinc-nickel (720 h), Dacromet (1000 h), or passivated<\/td>\n<\/tr>\n<tr>\n<td>Thread class<\/td>\n<td>G-series gauge-checked<\/td>\n<td>Same, with 100% thread gauge inspection<\/td>\n<\/tr>\n<tr>\n<td>O-ring<\/td>\n<td>Confirmed at order (NBR, FKM, EPDM and other compounds available)<\/td>\n<td>Same, matched to fluid and temperature<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p>Cold forging preserves the grain flow of the steel, which raises fatigue resistance under pressure pulsation. Each heat-treatment batch is hardness-tested and recorded, so the hardness number on the MTR matches the parts you receive.<\/p>\n<h3>Working Pressure<\/h3>\n<div>\n<div>\n<table>\n<thead>\n<tr>\n<th>Item<\/th>\n<th>Rating<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>O-ring seal end (BSPP male)<\/td>\n<td>Rated for the connection class with the O-ring, which sets the pressure and temperature limits of the joint; the rating for your part number is confirmed on the datasheet<\/td>\n<\/tr>\n<tr>\n<td>Crimped assembly<\/td>\n<td>Governed by the hose and confirmed per hose assembly test practice; braided hose at these sizes typically carries about 10-40 MPa depending on construction and size<\/td>\n<\/tr>\n<tr>\n<td>Factory test<\/td>\n<td>Every fitting is 100% pressure tested before shipment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p>The exact rating for your part number and hose combination is confirmed on the datasheet and by our engineers before shipment.<\/p>\n<h3>Pressure-Temperature Operating Envelope<\/h3>\n<div>\n<div>\n<table>\n<thead>\n<tr>\n<th>Temperature<\/th>\n<th>Pressure Retention<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>-40\u00b0C<\/td>\n<td>100% of rated pressure (O-ring compound dependent at the low end)<\/td>\n<\/tr>\n<tr>\n<td>-20\u00b0C<\/td>\n<td>100%<\/td>\n<\/tr>\n<tr>\n<td>0\u00b0C<\/td>\n<td>100%<\/td>\n<\/tr>\n<tr>\n<td>+20\u00b0C<\/td>\n<td>100%<\/td>\n<\/tr>\n<tr>\n<td>+40\u00b0C<\/td>\n<td>100%<\/td>\n<\/tr>\n<tr>\n<td>+60\u00b0C<\/td>\n<td>100%<\/td>\n<\/tr>\n<tr>\n<td>+80\u00b0C<\/td>\n<td>100%<\/td>\n<\/tr>\n<tr>\n<td>+100\u00b0C<\/td>\n<td>100% (O-ring compound dependent)<\/td>\n<\/tr>\n<tr>\n<td>+120\u00b0C<\/td>\n<td>Steel body holds; the joint limit is set by the O-ring compound, not the fitting<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p>The steel body and shoulder hold their strength across the full temperature window, but in this O-ring execution the practical service limit is set by the elastomer compound. Confirm the compound for your fluid and temperature range with our engineers, and the fitting will not be the limiting part of the assembly.<\/p>\n<h2>Selection and Ordering<\/h2>\n<p>The 12211 series covers the straight segment of BSP hydraulic hose fittings with male O-ring sealing, from -04 to -20, so most orders can be placed directly from the table above.<\/p>\n<h3>BSPP Thread Size Chart<\/h3>\n<p>Use this chart to identify the thread on your port. BSPP G threads are parallel; they are identified by measuring the thread outside diameter and counting the threads per inch.<\/p>\n<div>\n<div>\n<table>\n<thead>\n<tr>\n<th>BSPP Thread (G)<\/th>\n<th>TPI<\/th>\n<th>Thread Dash<\/th>\n<th>Typical Hose Dash<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>G1\/4&#8243;<\/td>\n<td>19<\/td>\n<td>-04<\/td>\n<td>-04, -06<\/td>\n<\/tr>\n<tr>\n<td>G3\/8&#8243;<\/td>\n<td>19<\/td>\n<td>-06<\/td>\n<td>-06<\/td>\n<\/tr>\n<tr>\n<td>G1\/2&#8243;<\/td>\n<td>14<\/td>\n<td>-08<\/td>\n<td>-04 to -08<\/td>\n<\/tr>\n<tr>\n<td>G5\/8&#8243;<\/td>\n<td>14<\/td>\n<td>-10<\/td>\n<td>-10<\/td>\n<\/tr>\n<tr>\n<td>G3\/4&#8243;<\/td>\n<td>14<\/td>\n<td>-12<\/td>\n<td>-10 to -16<\/td>\n<\/tr>\n<tr>\n<td>G1&#8243;<\/td>\n<td>11<\/td>\n<td>-16<\/td>\n<td>-16<\/td>\n<\/tr>\n<tr>\n<td>G1.1\/4&#8243;<\/td>\n<td>11<\/td>\n<td>-20<\/td>\n<td>-20<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<h3>Cross Reference Service {#by-oem-part-number}<\/h3>\n<p>Most maintenance teams buy against a legacy part number printed on the old drawing. Send us the OEM or distributor part number you currently use, with a photo of the fitting if possible. Our engineers identify the thread, the O-ring seal geometry, the hose size, and the body configuration, then confirm the exact 12211 equivalent before you place the order. The service covers O-ring fittings, BSP hydraulic hose fittings, and the male stud ends of your inventory, and interchange confirmation is free. The cross reference sheet is returned in PDF for your records.<\/p>\n<h3>Packaging and Logistics<\/h3>\n<div>\n<div>\n<table>\n<thead>\n<tr>\n<th>Item<\/th>\n<th>Detail<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Standard packing<\/td>\n<td>10 pcs per box (typical), O-rings fitted or bagged with each fitting as specified<\/td>\n<\/tr>\n<tr>\n<td>Gross weight<\/td>\n<td>Calculated per size and confirmed on the proforma invoice<\/td>\n<\/tr>\n<tr>\n<td>Marking<\/td>\n<td>Carton label with part number, quantity, and batch number for incoming inspection<\/td>\n<\/tr>\n<tr>\n<td>Origin<\/td>\n<td>Made in China, HENGHUA factory<\/td>\n<\/tr>\n<tr>\n<td>Export documents<\/td>\n<td>Commercial invoice, packing list, MTR, certificate of conformity<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<h2>Assembly and Use Guide<\/h2>\n<h3>Four-Step Crimping Procedure<\/h3>\n<ol>\n<li><strong>Cut the hose square<\/strong>: use a hose cutter, never a hacksaw or an angle grinder. A square, clean end is the precondition for a uniform ferrule grip.<\/li>\n<li><strong>Mark the insert depth<\/strong>: read the insert depth for your hose series from the crimp data sheet and mark the line on the hose cover.<\/li>\n<li><strong>Lubricate and insert<\/strong>: apply a thin film of assembly lubricant to the stem and the hose bore, then push the fitting into the hose until the mark meets the ferrule.<\/li>\n<li><strong>Crimp and verify<\/strong>: select the die per the crimp table, crimp in one continuous stroke, then measure the crimp outside diameter with a caliper and compare with the tolerance.<\/li>\n<\/ol>\n<h3>Connecting the O-Ring Seal End<\/h3>\n<p>On the BSP male O-ring seal fitting, check that the O-ring is seated correctly in the groove at the base of the thread and that the ring is clean and undamaged; replace it if cut or flattened. Clean the flat face of the receiving BSPP port with a lint-free cloth. Thread the fitting into the port by hand until the shoulder meets the port face, then tighten to the torque listed for the thread size, wrenching the S1 hexagon. The O-ring compresses between the shoulder and the port face and does the sealing, so no thread sealant is used.<\/p>\n<h3>Installation Warnings<\/h3>\n<ul>\n<li>\u274c Never mix fittings and ferrules from different suppliers, even when the thread and hose sizes look identical. Stem geometry, ferrule hardness, and crimp parameters differ, and a mixed joint will leak or blow off under pressure.<\/li>\n<li>\u274c Never reuse a damaged or hardened O-ring, and never fit a ring of the wrong compound. The O-ring is the sealing element of this joint.<\/li>\n<li>\u274c Never confuse G (BSPP parallel) threads with R (BSPT taper) threads. A G thread with an O-ring seal seals on the compressed ring; a taper thread seals by thread interference and needs sealant. The two are not interchangeable.<\/li>\n<li>\u274c Never assume the port face is flat and clean; inspect it before assembly, because the O-ring seals on that face.<\/li>\n<li>\u274c Never crimp without the matching crimp data sheet. An under-crimped joint weeps, and an over-crimped joint damages the hose reinforcement.<\/li>\n<li>\u274c Never recrimp a fitting after a failed attempt, and never reuse a fitting removed from a hose.<\/li>\n<li>\u2714 After assembly, pressure-test the circuit at 1.5x working pressure and inspect all joints for weepage.<\/li>\n<\/ul>\n<h2>OEM Customization and Quality Traceability<\/h2>\n<h3>Customization Options<\/h3>\n<ul>\n<li><strong>O-ring compound selection<\/strong>: NBR, FKM, EPDM and other compounds matched to your fluid, temperature, and duty.<\/li>\n<li><strong>Size and thread customization<\/strong>: non-standard G thread and hose combinations and special stem lengths machined to your drawing.<\/li>\n<li><strong>Surface treatment customization<\/strong>: trivalent zinc (96 h), zinc-nickel (720 h), or Dacromet (1000 h) salt spray grades, selected by your environment and corrosion specification.<\/li>\n<li><strong>Laser marking<\/strong>: your logo, part number, and batch code laser-marked on the hex for full field traceability.<\/li>\n<li><strong>Material options<\/strong>: 304\/316L stainless for chemical, marine, and food-contact circuits, with passivation certificates.<\/li>\n<\/ul>\n<h3>Quality and Traceability System<\/h3>\n<p>Every batch follows a documented flow: incoming steel with mill certificate \u2192 cold forging \u2192 CNC machining \u2192 heat treatment \u2192 plating \u2192 O-ring compound verification \u2192 100% thread gauge and dimension inspection \u2192 pressure test \u2192 laser marking \u2192 packing. The batch number on the carton links back to the raw material lot, the heat-treatment record, the O-ring lot, and the inspection report. Material test reports (MTR) are provided with every order on request, and third-party inspection reports (BV\/SGS) can be arranged before shipment.<\/p>\n<h2>FAQ<\/h2>\n<p><strong>Q: What is a BSP male O-ring seal fitting?<\/strong>\u00a0A: It is a crimp-on fitting for braided hose whose port end is a male parallel G thread (ISO 228-1); an O-ring sits in a groove at the base of the thread and seals between the flat hexagon shoulder and the flat face of the receiving BSPP port.<\/p>\n<p><strong>Q: How does the O-ring seal work?<\/strong>\u00a0A: When the fitting is tightened into a BSPP female port with a flat face, the O-ring is compressed between the flat shoulder of the fitting and the flat face of the port. The ring does the sealing; the parallel G thread only holds the connection.<\/p>\n<p><strong>Q: What is the difference between this O-ring fitting and the 60\u00b0 cone seat male fittings?<\/strong>\u00a0A: The 60\u00b0 cone seat versions (12611 series and the double use 12611A) seal on a machined cone or on a bonded washer. This O-ring version seals on an elastomer ring at the thread base against a plain flat-faced port, which is the port style on many pumps, valves, and manifolds.<\/p>\n<p><strong>Q: Which O-ring compound should I use?<\/strong>\u00a0A: The compound must match your fluid and operating temperature. NBR suits mineral oils in standard duty, FKM covers higher temperatures and aggressive fluids, and EPDM suits water and brake-fluid systems. Send us your fluid and temperature and our engineers will confirm the compound before shipment.<\/p>\n<p><strong>Q: Which hoses work with the 12211 series?<\/strong>\u00a0A: The part numbers in the table are for braided hose from -04 to -20 (DN 6 to DN 32). For spiral hose, change the series number to 12212. Confirm your exact hose construction with our engineers, and the matching crimp data sheet will be supplied with the order.<\/p>\n<p><strong>Q: Can you provide crimp data for my hose?<\/strong>\u00a0A: Yes. Every order includes the crimp data sheet for your hose construction, with insert depth, crimp outside diameter, and die selection. Send us your hose series and brand, and our engineers will confirm the crimp parameters before shipment.<\/p>\n<h2>Request a Quote<\/h2>\n<p>Tell us the BSPP thread, the hose dash size, the hose construction, the fluid, the operating temperature, and the annual quantity. Whether you need stock BSP hydraulic hose fittings for distribution or a custom O-ring fitting for an OEM program, the quoting process is the same. For replacement orders, send the legacy part number and a photo, and our engineers will confirm the interchange and the O-ring compound before quoting. Every BSP male O-ring seal fitting leaves the HENGHUA factory pressure-tested, batch-coded, and backed by a written warranty. Request your quote, crimp data sheet, or drawing pack today, and we will respond within 24 hours.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Why This BSP Male O-Ring Seal Fitting Passes the Compliance Gate A BSP male O-ring seal fitting terminates a braided hydraulic hose in a male G-threaded stud that seals with an O-ring: the ring sits in a groove at the base of the thread and compresses between the flat hexagon shoulder and the flat face [&hellip;]<\/p>\n","protected":false},"featured_media":4133,"comment_status":"open","ping_status":"closed","template":"","meta":{"_surecart_dashboard_logo_width":"180px","_surecart_dashboard_show_logo":true,"_surecart_dashboard_navigation_orders":true,"_surecart_dashboard_navigation_invoices":true,"_surecart_dashboard_navigation_subscriptions":true,"_surecart_dashboard_navigation_downloads":true,"_surecart_dashboard_navigation_billing":true,"_surecart_dashboard_navigation_account":true,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[946],"product_tag":[1006,858,1003,1004,1005],"class_list":{"0":"post-4132","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsp-hydraulic-fittings","7":"product_tag-12211-fittings","8":"product_tag-bsp-hydraulic-hose-fittings","9":"product_tag-bsp-male-o-ring-seal-fitting","10":"product_tag-bspp-male-o-ring-fitting","11":"product_tag-g-thread-o-ring-seal-fitting","12":"desktop-align-left","13":"tablet-align-left","14":"mobile-align-left","15":"ast-product-gallery-layout-horizontal-slider","16":"ast-product-gallery-with-no-image","17":"ast-product-tabs-layout-horizontal","19":"first","20":"instock","21":"shipping-taxable","22":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.5 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>BSP Male O-Ring Seal Fitting 12211 Series G1\/4-G1.1\/4 | HENGHUA<\/title>\n<meta name=\"description\" content=\"BSP male O-ring seal fitting 12211: 12 sizes G1\/4-G1-1\/4, O-ring at thread base seals on flat port face. 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