1000/400/500 Series MIL-C-4109 Industrial Interchange Air Swing Coupling, Female Half With Safety Vent, -04 Coupling, 1/4-18 Male NPT

A
2.66
B
0.79
Coupling Size
-04
Brand
RTC North America Ltd
Brand
RTC North America
Pack Size
1.00
UOM
EA
Seal Material
Buna-N
Supplier Part Number
R20500317
Thread 1
1/4-18
Thread Sealant
No
Alternate Part Numbers
Alternate Part Number C1ZY89, Alternate Part Number MI-08754630, Alternate Part Number MINO-00691X96667
Product Weight
0.22 lbs

Product Questions & Answers

got a pile of different air plugs in the shop. is this female coupler picky, or will it hook up with the common ones
Question by: Hubert G on May 7, 2025, 6:24 AM
For interchangeability, it is built to MIL-C-4109 dimensions and it is meant for industrial air quick disconnect use when the male half type is not known. It accepts male halves from Aeroquip FD40 Series, Aeroquip FD41 Series (Aro 210), Tru-Flate, and Parker (Automotive).
Answer by: Customer Support on May 8, 2025, 11:31 AM
does this female half work with Tru-Flate and Parker automotive style male halves, or is it only gonna fit the Aeroquip stuff?
Question by: Keith W on Feb 24, 2026, 5:41 PM
Accepts male halves from Aeroquip FD40 Series, Aeroquip FD41 Series (also known as Aro 210), Tru-Flate, and Parker Automotive. That cross-compatibility is one of the main selling points on this coupling, so if you're running a mixed shop or just aren't sure what male half you're working with, it'll cover you across all four of those styles.
Answer by: Customer Support on Feb 25, 2026, 9:54 PM

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