1/2 - 20

PRATT & WHITNEY

1/2 20 NF 3 EXTRA LONG THREAD PLUG GAGE .5 GO NO GO P.D.'S = .4675 & .4701 UNF-3 - DW12329AC1

PIPE MACHINERY CO.

1/2 20 UNF BEFORE PLATE LEFT HAND THREAD PLUG GAGE .5 GO NO GO = .4719 & .4757 - DW11977AC1

REGAL-BELOIT

1/2 20 UNF 1B THREAD PLUG GAGE .5 NO GO ONLY P.D. = .4759 .50 .500 .5000 CHECK - DW11695AD1

1/2 20 NF SPECIAL THREAD PLUG GAGE .5 GO ONLY P.D. = .4678 UNF 2B OR 3B .50 .500 - DW10898BU

1/2 20 NA 2G STUB ACME THREAD PLUG GAGE .5 GO ONLY P.D. = .4700 INSPECTION CHECK - DW8287BU

1/2 20 UNJF 3B PREPLATE SHOP MADE THREAD PLUG GAGE .5 1/2"-20 INSPECTION CHECK - DW7512BU

PRATT & WHITNEY

1/2 20 NF OVERBASIC THREAD PLUG GAGE .5 GO NO GO P.D.'S = .4690 & .4738 UNF

1/2 20 NF 3 SPECIAL THREAD PLUG GAGE .5 GO ONLY P.D. = .4705 1/2-20 .50 .500

1/2 20 NF BEFORE PLATE THREAD PLUG GAGE .5 GO NO GO P.D.'S = .4685 & .4726 B/P

TRIPLE SEAL

1/2 20 UNF 2B THREAD PLUG GAGE .5 GO NO GO P.D.'S = .4675 & .4731 NF-2B .50-20

REGAL BELOIT

1/2 20 UNF 2B PLUS .002 THREAD PLUG GAGE .5 GO NO GO PDS= .4695 & .4751 OVERSIZE

BIRKEN MFG CO

1/2 20 2B SPECIAL THREAD PLUG GAGE .5 GO NO GO P.D.'S = .4705 & .4747 INSPECTION