This is a lock on air chuck. One side is 1/4" FNPT and the other locks on a schrader valve.
Air Accessories, Air Chucks, Lock On Chuck (Closed), 17-505
Air Chucks, Air Accessories, Lock On Chuck (Open), 17-505F *FREE SHIPPING
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4 STRAIGHT BRASS LOCK-ON TIRE INFLATOR AIR CHUCKS
4 BRASS LOCK-ON TIRE INFLATOR AIR CHUCKS
