Genuine Ford Vacuum Control Check Valve 7/16 x 7/16 x 3/8, One Way, FoMoCo | eBay
T&S B-0975 Dual Check Valve Type Vacuum Breaker with 3/8" NPT Female Connections
Amazon.com: One Way Non Return Check Valve (10mm 3/8" ABS) : Industrial & Scientific
Prod. # 8002, 3/8" 316 SS BSS Style Basic-Check® Threaded In-Line Check Valve On DFT Inc.
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Krowne KLD-CVT3 1/4" X 1/4" X 3/8" MasterTap Check Valve Tee
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Vacuum pump Intake Port: with hand valve: from 3/8 NPT to 1/4 and 3/8 inch SAE male Flare with a built-in hand valve, ball valve, isolation or check valve, hand operated, to
Replacement Vacuum Check Valve for Roadmaster InvisiBrake Second Vehicle Kit - 3/8" Roadmaster Accessories and Parts RM-452141
Check-All Bushing Check Valve, BUDSSVT.500SS, 1/2 x 3/8, SS Body, Viton, 1/2 PSI, 316 SS Spring | Control Specialties