Quick coupling plug D12 - M22x1,5

The D12 plug > M22×1.5 female quick coupling is an accessory connection part that enables fast connect/disconnect of D12-standard accessories and converts to an M22×1.5 female thread (internal thread). In service, it’s used for repairing connections, replacing worn end fittings, or upgrading an accessory set to a specific connection standard.

MPN / reference: 12441
Standard: D12 (plug)
Thread: M22×1.5 female

APPLICATION

The quick coupling is used in typical service and assembly work:

• quick accessory changes (lance, gun, hose) in the D12 standard,
• connecting accessories where the system side requires an M22×1.5 female thread,
• repairing joint leaks caused by wear of the connection component,
• building/modifying a hose and accessory set into one consistent connection standard.

SYMPTOMS - WHEN IT’S WORTH REPLACING

Consider replacing the quick coupling when you notice:

• leaks at the connection despite correct coupling,
• looseness at the joint or the plug “skipping” in the socket,
• damage to sealing surfaces or the locking mechanism,
• damaged/worn M22×1.5 thread,
• problems connecting/disconnecting accessories (binding, no secure latch).

HOW TO CHOOSE THE RIGHT PART

Selection should be unambiguous:

• confirm the quick-coupling standard: D12 - plug,
• confirm the thread on the other side: M22×1.5 female,
• verify the manufacturer number: MPN 12441,
• compare with the removed part: length, working geometry, and sealing method.

For quick couplings, matching the standard (D12) is critical - different “D” sizes can look similar but won’t mate correctly.

COMPATIBILITY

Select the quick coupling based on the D12 (plug) standard and the M22×1.5 female thread, according to the requirements of the accessories and the washer system. The safest confirmation is by comparing with the removed part and by MPN 12441.

[faq]

What’s the difference between a “plug” and a “socket” in D12 quick couplings?|The plug is the part inserted into the socket. They are complementary - plug and socket must be the same standard (here: D12), otherwise you won’t get a secure latch and sealing.

Does M22×1.5 “female” mean internal or external thread?|Female means an internal thread. In this case, the quick coupling has an M22×1.5 female thread on the connection side.

Why can the connection leak even though the plug “clicked”?|Most often due to dirt in the socket, worn working surfaces, or a mismatched standard of the mating part. Clean the coupling and check the seals.

Is it worth replacing the quick coupling if the only issue is difficult disconnecting?|Sometimes cleaning and checking seals is enough, but if the locking mechanism is worn or the coupling is damaged, replacement is usually the most reliable service fix.

How can I avoid fast wear of the quick coupling in workshop use?|Keep the coupling clean (sand and dust damage surfaces) and avoid pulling the hose at an angle. The coupling should operate axially, without misalignment.

[/faq]