4 1/4 - 16

JOHNSON GAGE CO.

4 1/4 16 N 2 SET THREAD PLUG GAGE 4.25 GO NO GO P.D.'S = 4.2094 & 4.2009 UN-2 - DW5998BU

G. WHALLEY

4 1/4 16 UN 3A LEFT HAND SET THREAD PLUG GAGE 4.25 GO NO GO PDS= 4.2094 & 4.2050 - DW3587RD

PENNOYER-DODGE CO.

4 1/4 16 UN 2A LEFT HAND SET THREAD PLUG GAGE 4.25 GO NO GO PDS= 4.2076 & 4.2017

PENNOYER - DODGE CO.

4 1/4 16 UN 3A SET THREAD PLUG GAGE 4.25 NO GO ONLY P.D. = 4.2050 QUALITY UN-3A