These Straight Adapter fittings are 1/4" OD on the single barbed end to fit with 1/4" ID hose, and 1/4" (National Pipe Thread) NPT Male on the other end. These parts are automotive industry approved and are the industry standard sizing.
10 ORB Male to 10 AN Male Straight Adapter Fitting
AN -10 (AN10 AN 10) to 1/2" BSP BSPP Straight Adapter
AN -10 (AN10 AN 10) to M16x1.5 Metric Straight Adapter
Sanden 7B10 Straight Adapter Air Fitting SD7B10 Vertical Manifold #8 #10 7176 AC
A/C MALE INSERT O RING TO #10 FEMALE A/C FLARE STRAIGHT ADAPTER 2609 / 35-12609
FRAGOLA 481611 #10 X 3/8 MPT STRAIGHT Adapter Black 481611-BL
