\r\n| 2.1\/2″X12<\/td>\r\n | Z2″X11.5<\/td>\r\n | 5JN-32<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n A row with one size group, such as 5JN-08, means the two ends are the size that matches that code; a row with two groups, such as 5JN-08-06, gives the cone end first and the NPT end second.<\/p>\r\n\r\n\r\n\r\n 3. How to Read a 5JN Part Number<\/h2>\r\n\r\n\r\n\r\n5JN<\/code> is the series code. In the HENGHUA American Adapters numbering the leading digit places the part in the male-to-female adapter family, the letter J<\/code> identifies the JIC cone interface and the letter N<\/code> identifies the NPT end, so the code itself tells the buyer that this is a cone-to-pipe-thread conversion part.<\/p>\r\n\r\n\r\n\r\nThe first size group is the cone end and follows the JIC dash convention: 04<\/code> for 7\/16″x20, 05<\/code> for 1\/2″x20, 06<\/code> for 9\/16″x18, 08<\/code> for 3\/4″x16, 10<\/code> for 7\/8″x14, 12<\/code> for 1.1\/16″x12, 16<\/code> for 1.5\/16″x12, 20<\/code> for 1.5\/8″x12, 24<\/code> for 1.7\/8″x12 and 32<\/code> for 2.1\/2″x12. The second group, when it appears, is the NPT end: 02<\/code> for 1\/8″, 04<\/code> for 1\/4″, 06<\/code> for 3\/8″, 08<\/code> for 1\/2″, 12<\/code> for 3\/4″, 16<\/code> for 1″, 20<\/code> for 1.1\/4″, 24<\/code> for 1.1\/2″ and 32<\/code> for 2″.<\/p>\r\n\r\n\r\n\r\nWorked example, 5JN-08-06<\/code>: the row in the table returns cone end thread E of 3\/4″x16, NPT end thread F of Z3\/8″x18, length A of 16.7 mm, overall length L of 39.6 mm and hex S1 of 22 mm. A JIC 74 degree cone adapter of that size can therefore be ordered from one six-character code.<\/p>\r\n\r\n\r\n\r\n4. Installation and Fitment<\/h2>\r\n\r\n\r\n\r\nThe two ends tighten on different principles, so they are handled as two separate operations. On the cone end, bring the cone into the mating seat and tighten the mating nut so the cone is drawn in squarely; the metal faces then limit travel and the seal is complete. On the NPT end, apply a thread sealant suited to the fluid to the male thread, screw the nipple in by hand, then tighten until the joint is seated. No tightening angle is published in this catalogue for the series, so torque practice follows the mating component and the machine specification.<\/p>\r\n\r\n\r\n\r\n Because the NPT end seals on the thread flanks, thread preparation is part of assembly. Clean both threads, remove old sealant, apply fresh sealant to the male thread only, and leave the first thread clean so excess sealant is not pushed into the fluid path. Do not use sealant on the cone end, because the cone seals metal to metal and sealant there can hold the cone off its seat.<\/p>\r\n\r\n\r\n\r\n Contamination control and alignment both matter. Keep the tapped port capped until assembly, keep the cone face free of nicks and dirt, and start both ends by hand before a wrench is applied so a cross thread is caught before it is forced.<\/p>\r\n\r\n\r\n\r\n Assembly steps:<\/p>\r\n\r\n\r\n\r\n \r\n- Confirm the two thread sizes against the part number row, cone end first and NPT end second.<\/li>\r\n\r\n\r\n\r\n
- Inspect the cone face and the tapped port for damage.<\/li>\r\n\r\n\r\n\r\n
- Clean the threads and apply a fluid-compatible sealant to the male NPT thread that will enter the female port.<\/li>\r\n\r\n\r\n\r\n
- Hold the adapter on hex S1 and start the mating part by hand on each end in turn.<\/li>\r\n\r\n\r\n\r\n
- Tighten the cone end with the mating nut until the cone seats, then tighten the NPT end to its seated position.<\/li>\r\n\r\n\r\n\r\n
- Pressurise and check both ends for weepage before the machine returns to service.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n
Common fitment errors and their symptoms:<\/p>\r\n\r\n\r\n\r\n \r\n- BSPT male nipple screwed into the NPT female end. The threads engage on the wrong form, the joint does not seat and it leaks under pressure. NPT and BSPT must never be interchanged.<\/li>\r\n\r\n\r\n\r\n
- No sealant on the NPT end. The joint weeps along the thread flanks, because this connection has no elastomer and no seat.<\/li>\r\n\r\n\r\n\r\n
- Sealant applied to the cone end. The cone cannot seat fully metal to metal and the joint seeps at the cone face.<\/li>\r\n\r\n\r\n\r\n
- Wrong cone size. The cone enters the seat but does not contact the seat face, and the joint leaks on the first pressure cycle.<\/li>\r\n\r\n\r\n\r\n
- Over-tightening to stop a leak instead of correcting the seat. The cone or the tapped port deforms and the adapter has to be replaced.<\/li>\r\n\r\n\r\n\r\n
- Reusing a cone that has run against a damaged seat. The imprint of the damage is carried into the new joint and the seal line is lost.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
Reuse policy: the body of a 5JN adapter may be cleaned and reused if the cone face and the tapped port are undamaged and the cone still seats cleanly. A cone that has been galled, deformed or run against a damaged seat is not reused, and thread sealant is removed and renewed at every re-assembly.<\/p>\r\n\r\n\r\n\r\n 5. Applications and Industries<\/h2>\r\n\r\n\r\n\r\nApplication tags for the 5JN series: hydraulic systems, water jetting, oil and gas, industrial equipment, construction machinery, agriculture, marine and material handling.<\/p>\r\n\r\n\r\n\r\n Concrete scenarios where this adapter is specified:<\/p>\r\n\r\n\r\n\r\n \r\n- Cross-standard equipment integration. Imported machines often present JIC cone ports while the locally built power pack or valve block uses taper pipe ports, and one machined body joins the two families so no hose assembly has to be rebuilt.<\/li>\r\n\r\n\r\n\r\n
- Repair and replacement on mixed circuits. When a pipe-threaded component is replaced by a cone-seat component on a service job, the adapter restores the connection without changing the rest of the circuit.<\/li>\r\n\r\n\r\n\r\n
- Test benches and flushing rigs. Benches are built from whatever standard the instruments and pump ports use, so a cone-to-pipe-thread adapter is a common manifold item.<\/li>\r\n\r\n\r\n\r\n
- OEM assembly lines and distributor kits. Distributors stock this JIC 74 degree cone adapter as a kit so a machine can be configured for a customer’s preferred port standard at the point of assembly, where a JIC adapter and an NPT adapter have to meet on the same machine.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n
6. Replacement and Cross-Reference Guide<\/h2>\r\n\r\n\r\n\r\nCross-reference for this series is organised by standard, thread size and sealing method, never by brand. Three questions decide the correct replacement: which thread standard the male end follows, which thread standard the female end follows, and how each end seals.<\/p>\r\n\r\n\r\n\r\n Measure these three things before ordering a replacement 5JN adapter:<\/p>\r\n\r\n\r\n\r\n \r\n- The male end thread. Measure the outside diameter over the thread and count the threads per inch, then match the result against the E column. A cone end is identified by the thread plus the visible cone in front of it.<\/li>\r\n\r\n\r\n\r\n
- The female end thread. Identify the taper pipe thread by measuring pitch and taper and confirm the size against the F column. Do not accept a pipe thread by eye, because NPT and BSPT look similar and are not interchangeable.<\/li>\r\n\r\n\r\n\r\n
- The sealing method at each end. Confirm that the male end seals on the cone and that the female end is a taper pipe port sealed on the flanks with a sealant. The sealing method, not the brand, is what makes a replacement compatible.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n
A practical check on the male end of a JIC adapter is to seat it dry in the mating seat and confirm that the cone contacts the seat face all the way round. On the female end, screw the mating nipple in by hand and confirm that it advances through the correct number of turns for that thread size.<\/p>\r\n\r\n\r\n\r\n 7. Ordering, Packaging and Delivery<\/h2>\r\n\r\n\r\n\r\nTo order a 5JN adapter, give the series code, the full part number, both thread sizes, the body material, the plating and the quantity, and state the fluid so the sealant recommendation can be confirmed. A complete line reads, for example: 5JN-12-08, cone end 1.1\/16″x12, NPT female end 1\/2″x14, carbon steel with trivalent chromium zinc plating, quantity 100 pieces.<\/p>\r\n\r\n\r\n\r\n If the required combination is not in the printed table, send both thread sizes and the intended fluid, and HENGHUA will confirm whether this hydraulic conversion adapter can be machined in that combination and whether the material and plating are available. The printed note for this series records that the mating nut and sleeve are ordered separately, with the NB200 nut and NB500 sleeve for metric tube and the NB200 nut with the NB300 sleeve for inch tube, so include those items on the same order when a complete tube-end assembly is required.<\/p>\r\n\r\n\r\n\r\n Samples are available so the cone seat and the tapped port can be proven on the customer’s own mating components before a production quantity is committed. Packaging follows the usual formats for this range, with bulk cartons and part number labels for distributor stock and labelled bags or boxed kits where parts go direct to an assembly line. Each carton records the part number, the two thread sizes, the quantity and the batch reference, and lead time is confirmed per order, because it depends on the thread combination, the material, the plating and the quantity.<\/p>\r\n\r\n\r\n\r\n 8. FAQ<\/h2>\r\n\r\n\r\n\r\nWhat is the difference between JIC 37\u00b0 flare and ORFS, and which should I use?<\/strong><\/p>\r\n\r\n\r\n\r\nA JIC 37\u00b0 flare per SAE J514 seals metal to metal on a conical flare face, with a nut drawing the flare into the cone. An ORFS joint per SAE J1453 seals on a flat face against an elastomeric O-ring set in a groove. Match the end to the port on the equipment. This series carries the JIC 74\u00b0 cone rather than a 37\u00b0 flare, and it seals on the wide cone face in the same metal-to-metal way.<\/p>\r\n\r\n\r\n\r\n Can NPT and BSPT be interchanged?<\/strong><\/p>\r\n\r\n\r\n\r\nNo, and they must never be mixed. NPT is the general purpose taper pipe thread of ANSI\/ASME B1.20.1, with the dryseal form covered by SAE J476, while BSPT is the taper pipe thread of ISO 7-1. The thread form and the pitch differ, so the joint either stops before it seats or bears on the wrong flanks and leaks. Where a machine carries BSPT ports, order a BSPT series instead of forcing an NPT part into the port.<\/p>\r\n\r\n\r\n\r\n How do I identify the correct 5JN size?<\/strong><\/p>\r\n\r\n\r\n\r\nRead both ends of the existing part. On the cone end, measure the thread outside diameter and count the threads per inch to find the E value; on the female end, identify the pipe thread size and pitch to find the F value, then pick the row where both match. Where the ends differ in size, a 5JN adapter carries both codes in its part number, as in 5JN-08-06.<\/p>\r\n\r\n\r\n\r\n What seal material should I select for my fluid and temperature?<\/strong><\/p>\r\n\r\n\r\n\r\nThis series has no elastomeric seal in its body, so the choice is the thread sealant on the NPT end and the seal material of the mating components on the cone end. Select a sealant compatible with the fluid and the operating temperature, and where the mating circuit carries an O-ring, use a compound that suits the fluid: NBR approximately -30\u00b0C to +100\u00b0C, FKM approximately -20\u00b0C to +200\u00b0C, and EPDM approximately -40\u00b0C to +120\u00b0C. Confirm the compound against the actual fluid, not only the fluid family.<\/p>\r\n\r\n\r\n\r\n How is the working pressure of this adapter determined?<\/strong><\/p>\r\n\r\n\r\n\r\nThe printed table for this series has no pressure column, so no per-size figure is published. Working pressure for these sizes is confirmed per order by HENGHUA engineering, based on the thread size, the sealing method and the material selected.<\/p>\r\n\r\n\r\n\r\n What is the minimum order quantity and can I get samples?<\/strong><\/p>\r\n\r\n\r\n\r\nMinimum order quantity is confirmed per order, because it depends on the thread combination, the material and whether the row is a catalogue size or a special. Samples are available for validation so the cone seat and the tapped port can be tested against the customer’s own mating parts. Send both thread sizes and the intended fluid, and HENGHUA will quote the sample line and the production line together.<\/p>\r\n\r\n\r\n\r\n What does the Z prefix in the thread column mean?<\/strong><\/p>\r\n\r\n\r\n\r\nThe Z<\/code> prefix is the catalogue marking for a taper pipe thread, so Z1\/4\"X18<\/code> is a 1\/4″ NPT taper thread with 18 threads per inch. It does not indicate a sealing washer or a straight thread. The prefix is the quick way to see that the second connection on this NPT adapter is a taper pipe port that seals on the thread flanks with a sealant.<\/p>\r\n\r\n\r\n\r\nWhy is a nut and sleeve ordered separately with this adapter?<\/strong><\/p>\r\n\r\n\r\n\r\nThe printed note for this series states that the nut and sleeve are separate items, because the 74\u00b0 cone end is drawn up by a nut on the mating tube end rather than by a nut built into this body. The NB200 nut with the NB500 sleeve suits metric tube, and the NB200 nut with the NB300 sleeve suits inch tube, so ordering them on the same line keeps the cone end assembly complete.<\/p>\r\n\r\n\r\n\r\n HENGHUA manufactures the 5JN adapter in 18 catalogue rows covering 7\/16″x20 up to 2.1\/2″x12 on the cone end and Z1\/8″x27 up to Z2″x11.5 on the NPT end. Send the two thread sizes, the body material and the circuit fluid, and HENGHUA will confirm the part number, the finish and the delivery schedule for your inquiry.<\/p>\r\n\r\n\r\n\r\n Related series in the same family: the 1JN adapter (straight)<\/a> and the 1JO adapter (straight)<\/a>. Browse the full Hydraulic Adapters range<\/a> for the complete SAE J514 JIC, NPT, ORFS and ISO 6162 flange families.<\/p>","protected":false},"excerpt":{"rendered":"The 5JN adapter is a straight hydraulic conversion adapter that joins an SAE J514 JIC 74\u00b0 cone male stud end to an NPT female tapped port in one machined body. The E end seals metal to metal on the 74\u00b0 cone face, while the F end is a taper pipe thread that seals on the thread flanks with a sealant. It covers 18 catalogue rows from 7\/16″x20 to 2.1\/2″x12, in carbon steel with trivalent chromium zinc plating or 304 \/ 316 stainless steel, for cross-standard equipment integration, repair jobs and OEM assembly lines.<\/p>","protected":false},"featured_media":5179,"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":[1426],"product_tag":[1844,1808,1830,1788,1804],"class_list":{"0":"post-5181","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-hydraulic-adapters","7":"product_tag-5jn-adapter","8":"product_tag-hydraulic-conversion-adapter","9":"product_tag-jic-74-degree-cone-adapter","10":"product_tag-jic-adapter","11":"product_tag-npt-female-adapter","12":"desktop-align-left","13":"tablet-align-left","14":"mobile-align-left","15":"ast-product-gallery-layout-horizontal-slider","16":"ast-product-tabs-layout-horizontal","18":"first","19":"instock","20":"shipping-taxable","21":"product-type-simple"},"yoast_head":"\n 5JN Adapter | JIC 74\u00b0 Cone Male to NPT Female Adapter<\/title>\n<meta name=\"description\" content=\"5JN adapter: JIC 74\u00b0 cone male to NPT female hydraulic conversion adapter. Complete 18-row size table, sealing rules, installation steps and buyer FAQ.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.henghuahose.com\/pt\/product\/jic-male-74-degree-cone-npt-female-adapter-5jn\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"5JN JIC Male 74\u00b0 Cone to NPT Female Adapter - 5JN Adapter for Cone-to-Pipe-Port Conversion\" \/>\n<meta property=\"og:description\" content=\"5JN adapter: JIC 74\u00b0 cone male to NPT female hydraulic conversion adapter. 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![\"5JN](\"https:\/\/www.henghuahose.com\/wp-content\/uploads\/2026\/09\/jic-male-74-degree-cone-npt-female-adapter-5jn-dimensions.png\")
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