Inch

TAFT PEIRCE

1/2 13 NC 3 LEFT HAND THREAD RING GAGE .5 GO ONLY P.D. = .4500 L.H. LH QUALITY

S.G. CO.

5/8 11 SP SPECIAL THREAD RING GAGE .625 NO GO ONLY P.D. = .5670 MODIFIED .6250

ALAMEDA

1/2 20 NS SPECIAL PITCH DIA THREAD RING GAGE .5 GO ONLY P.D. = .4652 SPL. .500

ATLAS

1/2 20 UNS 3A MODIFIED THREAD RING GAGE .5 NO GO ONLY P.D. = .4643 NS-3A .50

FIELD

1/2 32 UNS 2A THREAD RING GAGE .5 GO ONLY P.D. = .4786 .50-32 NS-2A INSPECTION

5/16 28 NS 3 LEFT HAND THREAD RING GAGES .3125 GO NO GO P.D.'S= .2893 & .2869 LH

1/2 32 NS 2A THREAD RING GAGES .5 GO NO GO P.D.'S = .4797 & .4763 1/2-32 UNS-2A

S.C.C.

5/16 24 NF 2 UNDERSIZE .003 THREAD RING GAGES .3125 GO NO GO P.D.'S= .2824 .2791

S.C.C.

5 40 UNC 2A .003 UNDERSIZE THREAD RING GAGES #5 .125 GO NO GO P.D.'S .1050 .1024

HEMCO

1/4 20 NC 3 LEFT HAND THREAD RING GAGE .25 GO ONLY P.D. = .2175 L.H. LH .250-20

R & K TOOL

1/4 28 UNF 2A PREPLATE THREAD RING GAGE .25 NO GO ONLY P.D. = .2198 B/P P.P.

PMC INDUSTRIES

7/16 32 UN 3A THREAD RING GAGE .4375 GO ONLY P.D. = .4172 7/16-32 N-3A QUALITY