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Hydraulic Quick Couplers

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Hydraulic quick couplers let you connect and disconnect pressure lines without tools, and the right one is defined by its connection profile (ISO 7241-A poppet, ISO 16028 flat-face, or agricultural push-to-connect), body size or dash, port thread, and material. We stock 460+ couplers in matched half-coupling sets, and profiles that look alike often do not interchange across standards. Not sure which body your equipment uses? send your specs for a cross-reference.

Item SKU: 800801003

Parker FEM-371-8FO, 3/8", Female Coupler, 3/4-16 UNF, 6 GPM, 3,000 PSI, ISO 16028, Flush Face, FF Series

Item SKU: FEM-372-8FO

Parker FEM-372-8FO Female SAE Hydraulic Coupling

Item SKU: FEM-501-12FO-NL

Parker FEM-501-12FO-NL, 1/2″, Female Coupler, 1 1/16-12 UNF, 12 GPM, 3,625 PSI, ISO 16028, Flush Face, FEM Series

Item SKU: FEM-502-10FO

Parker FEM-502-10FO Female SAE Hydraulics Coupling

Parker FF-251-4FP Female NPSF Coupling, Hydraulic Fitting

Parker FF-252-6FO Steel Hydraulic Coupling Female SAE – 6

Item SKU: FF-751-12FO

Parker FF-751-12FO Female SAE Coupling Steel 12 SAE

Item SKU: FF-752-12FO

Parker FF-752-12FO Female SAE Coupling High-Quality Steel

Parker PD343 Flush-Face Coupling 1/4 NPTF Connection

Stucchi 808101012, VEPHD Series, Threaded Flat Face Coupler, Connect Under Pressure

Stucchi 815300036, VEPHD Series, Aluminum Dust Plug

Stucchi 815300037, VEPHD Series, Aluminum Dust Cap

Stucchi 815300038, VEPHD Series, Aluminum Dust Plug

Stucchi 815300039, VEPHD Series, Aluminum Dust Cap

Stucchi Female 1/2" NPT Coupler | F.FIRG 12 NPT | 800801002

Stucchi Male 1/2″ NPT Connect Under Pressure Coupler | M.APM 9 1/2 | 805201003

S31-3P Male Tip 3/8″ Poppet

Stucchi 808101011, VEPHD Series, Threaded Flat Face Coupler, Connect Under Pressure

$128.70

4.82 out of 5

23 Reviews

Item SKU: FF-752-12FP

Parker FF-752-12FP Female NPSF Coupling 3/4 NPSF Steel

Item SKU: FEM-372-8FP

Parker FEM-372-8FP Steel Female NPSF Coupling ISO 16028

Parker H4-63 60 Series Female NPTF Fitting 1/2 NPTF Steel

Parker PD342 Test Port Flush-Face Coupling 1/4 NPTF

Parker 4110-5 Quick Disconnect Coupling 3/4 NPTF Steel

Parker FF-251-6FO Steel Female SAE Coupling

OBSOLETE FF495-6-12, #12 ORB Female

4.67 out of 5

19 Reviews

Item SKU: S561-6

3/4" Male Tip Quick Coupler, S561-6

801304008 | A PREMIER SERIES STUCCHI SAE QUICK COUPLER 3/8″

Stucchi 808101010, VEPHD Series, Threaded Flat Face Coupler, Connect Under Pressure

Parker H4-66 60 Series General Purpose Dust Cap Aluminum

$24.57

4.82 out of 5

23 Reviews

Item SKU: FF-751-12FP

Parker FF-751-12FP Female NPSF Coupling for Hydraulic Systems

FF495-3, 3/8" Female Coupler Body (Socket)

800801006 | FIRG SERIES STUCCHI QUICK COUPLER 1/2″

Parker 4010-6P Female NPTF 1” Quick Disconnect Coupling

806501010 | VEP SERIES STUCCHI QUICK COUPLER 1 1/4″

Parker 6108-16 Dust Cap 6100 Series Thread-To-Connect

801304006 | A PREMIER SERIES STUCCHI SAE QUICK COUPLER 3/8″

S35-3P Female Tip 3/8″ Poppet

$29.76

4.76 out of 5

18 Reviews

How to Choose a Hydraulic Quick Coupler

A coupler is only correct when both halves share the same profile and the port end matches your hose or adapter. Match these before you order:

Connection profile / standard: ISO 7241-A (poppet), ISO 16028 (flat-face), or agricultural push-to-connect. Profiles are generally not cross-compatible, so both halves should follow the same standard.
Body size / dash: commonly 1/4", 3/8", 1/2", 3/4", and 1". Body size is set by flow and pressure, not just the port thread.
Port thread standard: NPT, SAE O-ring boss, BSPP, or ORFS. Confirm the thread on the component the coupler threads into.
Material: plated steel for general service; brass or stainless where corrosion or wash-down is a factor.
Half needed: male (plug/nipple) or female (socket/coupler). Order the mating half your existing equipment is missing.
OEM cross-reference: note the number stamped on the old coupler so an equivalent profile can be confirmed.

Which Quick Coupler Is Right for the Job?

ISO 7241-A poppet couplers are the general-purpose choice for tractors, loaders, and skid steers, and they tolerate field debris well. ISO 16028 flat-face couplers seal flush, so they spill less oil and pick up less dirt on connection, which makes them common on newer construction and excavator auxiliary circuits. Agricultural push-to-connect couplers are the legacy 1/2" tip style on much older equipment. These standards typically will not mate with one another, so identify the profile your machine already runs before adding a half. If you can read a number stamped on the body, match it; if not, the body diameter, tip shape, and locking method usually narrow it down.

Complete the System

A coupler is one link in the line. Thread it to the correct port using Adapters when the coupler port and the component thread differ, and build the assembly with Hydraulic Hoses and Crimp Fittings. Keep open coupler halves clean between uses with Dust Caps and Plugs, and browse related Industrial Fittings or the full Fittings range for the rest of the circuit.

Cross-Referencing an Obsolete Quick Coupler

Distributing hydraulic parts since 1963, we keep cross-reference data on coupler profiles that manufacturers have discontinued or renumbered. If the coupler on your equipment is no longer cataloged, send the stamped part number plus the body size and a photo of the tip. We confirm the matching profile and a current equivalent before you buy, so the new half mates with the half already on the machine. To match a discontinued or unmarked coupler, request a cross-reference.

Hydraulic Quick Couplers – Frequently Asked Questions

How do I measure or identify the quick coupler my equipment uses?

Read any number stamped on the body first, then measure the body diameter and note the tip shape and locking method. Those three details usually point to the connection profile and body size even when no part number is legible.

What specs do I need before ordering a quick coupler?

You need the connection profile (ISO 7241-A, ISO 16028, or agricultural push-to-connect), the body size or dash, the port thread standard such as NPT, SAE O-ring boss, BSPP, or ORFS, the material, and whether you need the male or female half.

What is the difference between ISO 7241-A and ISO 16028 flat-face couplers?

ISO 7241-A is a poppet-style general-purpose coupler common on tractors and loaders; ISO 16028 is a flush, flat-face coupler that spills less oil and resists contamination, which is why it is common on newer construction equipment. The two profiles do not mate with each other. To finish the line on either profile, see Crimp Fittings.

Will a male and female coupler from different profiles connect?

Generally no. Both halves must share the same standard and body size to seal and lock. If your two halves do not match, replace one half rather than forcing a connection.

Do I need an adapter between the coupler and my hose?

If the coupler port thread differs from your hose end or component, yes. Match the thread with an Adapter so the coupler seats correctly without cross-threading.

How should I protect coupler halves when they are disconnected?

Cap the open ends with Dust Caps and Plugs to keep dirt out of the valve. Contamination on a poppet or flat-face seal is a common cause of leaks and hard connections.

Can a quick coupler connect under pressure?

Trapped pressure in either half can make a coupler difficult or impossible to connect. Relieve residual pressure on both halves before connecting; some flat-face designs help, but you should still bleed the line first.

Can you cross-reference an obsolete or unmarked quick coupler?

Yes. Send the stamped part number if it is readable, plus the body size and a photo of the tip, and we will confirm the matching profile and a current equivalent before you order so the new half mates with what is on your machine. Request a quote.

Hydraulic Quick Couplers

800801003 | FIRG SERIES STUCCHI QUICK COUPLER 3/8″

800801004 | FIRG SERIES STUCCHI QUICK COUPLER 3/8″

800801005 | FIRG SERIES STUCCHI QUICK COUPLER 3/8″

800801007 | FIRG SERIES STUCCHI QUICK COUPLER 1/2″

801304005 | A PREMIER SERIES STUCCHI SAE QUICK COUPLER 3/8″

803304004 | A PREMIER SERIES STUCCHI SAE QUICK COUPLER 1/2″

Parker 4000 Series 1/4 NPTF Quick Disconnect Coupling

Parker 4000 Series 8010-4 Female NPTF 1/2” Coupling

Parker 4000-4 Female NPTF Quick Disconnect Coupling – Steel

Parker 4050-16 4000 Series Female SAE Quick Disconnect Coupling

Parker 4150-5 Quick Disconnect Coupling | General Purpose

Parker FEM-371-8FO, 3/8", Female Coupler, 3/4-16 UNF, 6 GPM, 3,000 PSI, ISO 16028, Flush Face, FF Series

Parker FEM-372-8FO Female SAE Hydraulic Coupling

Parker FEM-501-12FO-NL, 1/2″, Female Coupler, 1 1/16-12 UNF, 12 GPM, 3,625 PSI, ISO 16028, Flush Face, FEM Series

Parker FEM-502-10FO Female SAE Hydraulics Coupling

Parker FF-251-4FP Female NPSF Coupling, Hydraulic Fitting

Parker FF-252-6FO Steel Hydraulic Coupling Female SAE – 6

Parker FF-751-12FO Female SAE Coupling Steel 12 SAE

Parker FF-752-12FO Female SAE Coupling High-Quality Steel

Parker PD343 Flush-Face Coupling 1/4 NPTF Connection

Stucchi 808101012, VEPHD Series, Threaded Flat Face Coupler, Connect Under Pressure

Stucchi 815300036, VEPHD Series, Aluminum Dust Plug

Stucchi 815300037, VEPHD Series, Aluminum Dust Cap

Stucchi 815300038, VEPHD Series, Aluminum Dust Plug

Stucchi 815300039, VEPHD Series, Aluminum Dust Cap

Stucchi Female 1/2" NPT Coupler | F.FIRG 12 NPT | 800801002

Stucchi Male 1/2″ NPT Connect Under Pressure Coupler | M.APM 9 1/2 | 805201003

S31-3P Male Tip 3/8″ Poppet

Stucchi 808101011, VEPHD Series, Threaded Flat Face Coupler, Connect Under Pressure

Parker FF-752-12FP Female NPSF Coupling 3/4 NPSF Steel

Parker FEM-372-8FP Steel Female NPSF Coupling ISO 16028

Parker H4-63 60 Series Female NPTF Fitting 1/2 NPTF Steel

Parker PD342 Test Port Flush-Face Coupling 1/4 NPTF

Parker 4110-5 Quick Disconnect Coupling 3/4 NPTF Steel

Parker FF-251-6FO Steel Female SAE Coupling

***OBSOLETE*** FF495-6-12, #12 ORB Female

3/4" Male Tip Quick Coupler, S561-6

801304008 | A PREMIER SERIES STUCCHI SAE QUICK COUPLER 3/8″

Stucchi 808101010, VEPHD Series, Threaded Flat Face Coupler, Connect Under Pressure

Parker H4-66 60 Series General Purpose Dust Cap Aluminum

Parker FF-751-12FP Female NPSF Coupling for Hydraulic Systems

FF495-3, 3/8" Female Coupler Body (Socket)

800801006 | FIRG SERIES STUCCHI QUICK COUPLER 1/2″

Parker 4010-6P Female NPTF 1” Quick Disconnect Coupling

806501010 | VEP SERIES STUCCHI QUICK COUPLER 1 1/4″

Parker 6108-16 Dust Cap 6100 Series Thread-To-Connect

801304006 | A PREMIER SERIES STUCCHI SAE QUICK COUPLER 3/8″

S35-3P Female Tip 3/8″ Poppet

How to Choose a Hydraulic Quick Coupler

Which Quick Coupler Is Right for the Job?

Complete the System

Cross-Referencing an Obsolete Quick Coupler

Hydraulic Quick Couplers – Frequently Asked Questions

Quick Buy

OBSOLETE FF495-6-12, #12 ORB Female