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1000/400/500 Series MIL-C-4109 Industrial Interchange Air Swing Coupling, Female Half With Safety Vent, -06 Coupling, 3/8-18 Female NPT

A 2.79	B 0.94	Coupling Size -06	Brand RTC North America Ltd	Brand RTC North America	Pack Size 1.00	UOM EA	Seal Material Buna-N	Supplier Part Number R20500026	Thread 1 3/8-18	Thread Sealant No	Alternate Part Numbers Alternate Part Number C1ZY94, Alternate Part Number MI-07566909, Alternate Part Number MINO-00691X00137	Product Weight 0.31 lbs

Product Questions & Answers 2

Product Questions & Answers

what's the deal with that safety vent feature on this coupling

Question by: Larry W on May 5, 2025, 10:29 AM

Safety vents automatically release trapped air pressure when you disconnect the coupling, preventing dangerous pressure buildup and making disconnection safer. Without it, stored pressure could cause the coupling to pop off forcefully when disconnected, which creates safety hazards in industrial air systems.

Answer by: Customer Support on May 6, 2025, 6:40 PM

I’m lookin to hook up some air tools... will this fit standard fittings?

Question by: Shawn R on Feb 17, 2025, 8:45 PM

This female half coupling is made to the MIL-C-4109 standard, which is an industrial interchange. It has a 3/8-18 female NPT thread, so as long as your air tools and fittings are compatible with that standard and thread size, it should work for you.

Answer by: Customer Support on Feb 19, 2025, 4:14 PM

Similar Products

Model Number	Coupling Size	Thread 1	Seal Material	A	B
20500026	-06	3/8-18	Buna-N	2.79	0.94
20500110	-08	1/2-14	Buna-N	3.31	1.38
20500311	-04	1/4-18	Buna-N	2.54	0.79