3 1/4 - 8

S.W.G. CO.

3 1/4 8 UN 2A THREAD RING GAGE 3.25 NO GO ONLY P.D. = 3.1575 3.250 3.2500 CHECK - DW11612AA1

S.G. CO.

3 1/4 8 UN 3A THREAD RING GAGE 3.25 NO GO ONLY P.D. = 3.1623 N-3A 3 1/4"-8 CHECK - DW6809RD

3 1/4 8 UN 2A THREAD RING GAGE 3.25 GO ONLY P.D. = 3.1662

SHOP MADE 3 1/4 8 THREAD RING GAGE 3.25 QUALITY INSPECTION 3 1/4-8 SHOP TOOL

GTD / THE PIPE MACHINERY CO

3 1/4 8 ACME 3C LEFT HAND THREAD RING GAGES 3.25 GO NO GO PD'S = 3.1770 & 3.1668