1/4 - 20

GTD

1/4 20 UNC 2A W UNDERSIZE SET THREAD PLUG GAGE .25 GO NO GO PD'S = .2146 & .2111 - DW10807BU

1/4 20 UNS SPECIAL SET THREAD PLUG GAGE .25 GO NO GO P.D.'S = .2211 & .2191 NS - DW7795BU

G.A. CO.

1/4 20 UNC 3A SET THREAD PLUG GAGE .25 NO GO ONLY P.D. = .2147 NC-3A INSPECTION - DW6407BU

GREENFIELD

1/4 20 UNC 2A LEFT HAND PREPLATE SET THREAD PLUG GAGE .25 GO ONLY P.D. = .2144 - DW4124BU

DOALL

1/4 20 UNJS SET THREAD PLUG GAGE .25 GO NO GO P.D.'S = .2233 & .2218 QUALITY - DW3463RD

HEMCO

1/4 20 UNS 2A SET THREAD PLUG GAGE .25 NO GO ONLY P.D. = .2127 NS-2A QUALITY - DW3323RD

PIPE MACHINERY CO.

1/4 20 NC 2 HILO SET THREAD PLUG GAGE .25 GO NO GO P.D.'S = .2175 & .2139 UNC-2

PENNOYER-DODGE

1/4 20 NC 2 SET THREAD PLUG GAGE .25 NO GO ONLY P.D. = .2139 CHECK FOR RING .250

AGMACO

1/4 20 NS SPECIAL SET THREAD PLUG GAGE .25 NO GO ONLY P.D. = .2099 .250-20 UNS

G.A. CO.

1/4 20 UNC 2A PREPLATE SET THREAD PLUG GAGE .25 GO NO GO P.D.'S = .2150 & .2116

HEMCO

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

PMC INDUSTRIES

1/4 20 NC HILO SPECIAL SET THREAD PLUG GAGE .25 GO ONLY P.D. = .2152 SPEC. .250