1 3/8 - 28

SWANSON

1 3/8 28 UNJ 3A THREAD RING GAGES 1.375 GO NO GO P.D.'S = 1.3518 & 1.3487 CHECK - DW7805BU

1 3/8 28 UNS 2A THREAD RING GAGE 1.375 NO GO ONLY P.D. = 1.3465 NS-2A INSPECTION - DW6793RD