Quick Connect Air Couplers

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Revision as of 20:24, 4 December 2025 by Littleguy (talk | contribs) (Created page with "Terminology for 1/4" Quick Connect Air Couplers uses "industrial" and "automotive" labels common retail terms for two main styles of 1/4" NPT quick connects. They refer to the shape of the male plug (not the coupler itself), which determines compatibility. Style Plug Tip Shape Coupler Sleeve Markings Common Colors Notes ----- -------------- ----------------------- ------------- ----- Industri...")
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Terminology for 1/4" Quick Connect Air Couplers uses "industrial" and "automotive" labels common retail terms for two main styles of 1/4" NPT quick connects. They refer to the shape of the male plug (not the coupler itself), which determines compatibility. 

Style        Plug Tip Shape                      Coupler Sleeve Markings       Common Colors     Notes
-----        --------------                      -----------------------       -------------     -----
Industrial   Outward bevel/ring (M-style)        Two stripes                   Red               Tighter seal; standard for tools; less leak-prone.
Automotive   Inward bevel (T-style/Tru-Flate)    One stripe                    Blue              Slightly looser fit; common in auto shops; may hiss if low-quality.
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