Hydraulic Fittings

What Are Hydraulic Fittings?

Hydraulic fittings are the mechanical components that join hoses, tubes, pumps, valves, and cylinders into a sealed fluid circuit. Each fitting has two ends: a connection end that mates with the machine port or tube, and a hose end that is crimped onto the hose. Choose the right pair, and the assembly holds pressure without leakage; choose wrong, and the line fails.

Five questions define a fitting. We answer all of them on this page:

1. What connection type fits my port — JIC, ORFS, NPT, BSP, flange, or metric?
2. What thread size and dash size do I need?
3. Which hose family is on the other end?
4. What material suits my fluid and environment?
5. How is it installed and crimped?

Core value: correct connection identification and correct crimping are the two steps that keep a hydraulic line leak-free and pull-off-resistant.

Three customer paths:

• For OEM manufacturers — standardize connection types across your machine range and lock in repeatable assembly quality. 
• For end users and maintenance teams — identify the failed connection, then order the correct replacement the first time. 
• For distributors — consolidate the full connection range in one catalog, with mixed-size sample kits and private labeling. 

Connection Families

Types of hydraulic fittings divide by connection end. Each family below has its own dedicated page with thread charts and dimensions.

Every order starts with the connection end. Measure the port thread and seat angle, or send us a photo, and we identify the family for you free of charge.

Key Specifications

Hose-Side: Matching Ferrule Series

The hose end of each fitting is matched to a hose family and its ferrule series. The table below lists the full crimp-side range, dash 03 to 32 (DN 4 to 50).

Assembly working pressure follows the hose family: 1SN to 250 bar, 2SN to 400 bar, 4SP to 450 bar in the smallest sizes, R12 at 4,000 psi (276 bar) constant, and PTFE to about 207 bar (3,000 psi) in small bores. Confirm the final value against your hose data sheet.

Material and Surface Finish

Material choice is the second decision when buying hydraulic fittings for corrosive or hygienic service.

Key Features

• Six connection families under one roof: JIC, ORFS, NPT/NPTF, BSPP/BSPT, SAE flange, 24° cone
• Ten ferrule series covering 1SN, 2SN, R7, 4SP/4SH, R12, and PTFE hoses
• No-skive and one-piece crimp designs for fast, repeatable assembly
• Corrosion protection: ≥120 h salt spray, zinc-nickel and stainless options
• Single-use integrity: fresh parts for every assembly, batch traceability

Crimping and Installation

Every fitting in this range is crimped with standard hydraulic crimping machines and common die sets. We provide reference crimp data and die selection for your machine model with every order.

Installation steps:

1. Cut the hose square with a sharp hose cutter.
2. Prepare the hose end per the hose maker’s instructions (skive where required, e.g. 4SH and R12).
3. Insert the stem fully into the hose bore.
4. Slide the ferrule over the hose end and seat it against the stem shoulder.
5. Crimp with a hydraulic hose crimping machine to the target crimp diameter from the hose maker’s chart.
6. Verify the crimp O.D. with a caliper and record the value.

Two rules prevent failures: always use the target crimp diameter from the hose maker’s chart, and never re-crimp a used part. Fittings and ferrules are single-use components.

Nomenclature: How Part Numbers Work

Hydraulic fittings in this catalog follow two naming logics. Learn both and you can order without confusion.

Logic 1 — series and dash (ferrules and one-piece fittings). The part number is SERIES - DASH. Example: 00400-12 is the one-piece family for 4SP/4SH/R12 hoses at dash 12 (DN 20).

Logic 2 — connection end and hose end (crimp fittings). The number states both ends. Example: a -06 JIC 37° flare connection on a -06 (3/8 in) hose, in a straight or 90° configuration, is described by both dash codes.

We assign the exact part number for your configuration on request. Send us the connection type, thread or dash size, hose family, and configuration, and our engineers confirm the code before you order.

Matching by Hose Family

Use this table to select the correct ferrule series, then pair it with the connection end you need:

We do not list competitor part numbers on this page. Send us your hose brand and construction, and our engineers verify the exact match before you order.

Applications and Industries

This range serves every industry that moves fluid under pressure:

• Agriculture: tractors, harvesters, and implements
• Construction and mobile equipment: excavators, loaders, and cranes
• Material handling: forklifts and lift trucks
• Machine tools and industrial automation
• Mining and tunneling: drills, crushers, and conveyors
• Oil and gas, marine, and offshore
• Chemical, pharmaceutical, and food processing
• Hydraulic power units and test benches

Operating range follows the hose and fluid: rubber assemblies typically run from -40 °C to +100 °C (R12 to +121 °C), and PTFE assemblies from -70 °C to +260 °C at the core.

Ordering and Packaging

• Unit of measure: sold per piece (EA), packed in boxes per size
• MOQ: one box per size; mixed-size sample kits available
• Customization: connection type, material, surface finish, private labeling, special packaging
• Export packing: corrugated cartons with moisture barrier for sea freight

Hydraulic Fittings FAQ

Can NPT and BSP threads be mixed? No. NPT is a 60° tapered pipe thread; BSP is a 55° British pipe thread. They are not interchangeable, and mixing them causes leaks or thread damage.

How do I confirm a fitting matches my hose? Three checks: confirm the connection thread and seat, match the hose dash to the hose I.D., and confirm the hose construction against the ferrule series table. Send us both measurements and we verify the full part number.

Brass or stainless steel — which do I need? Brass suits low-pressure air, water, and general service. Stainless steel suits corrosive chemicals, food, pharmaceuticals, and marine environments. Our range is supplied in zinc-plated carbon steel or stainless steel.

What types of hydraulic fittings are available? Six connection families: JIC 37° flare, ORFS, NPT/NPTF, BSPP/BSPT, SAE flange, and 24° cone metric, each matched with hose-side ferrule series for braided, spiral, thermoplastic, and PTFE hoses.

What is the difference between JIC and ORFS? Both use straight threads, but JIC seals at a 37° metal-to-metal flare while ORFS seals with an O-ring on a flat face. ORFS is preferred for zero-leak, high-pressure, and high-vibration service.

Can fittings be reused after a hose fails? No. Crimp fittings and ferrules are single-use components. Always install new parts for every new assembly.

Do you supply complete hose assemblies? Yes. We supply matched fitting-and-ferrule sets and complete assemblies, with verified part numbers, crimp data, and batch traceability on request.