1 1/4 - 12

PD

1 1/4 12 UNF 3A LEFT HAND THREAD RING GAGES 1.25 GO NO GO PD'S = 1.1959 & 1.1913 - MS1551BU

S.G. CO.

1 1/4 12 UNF 2A PREPLATE THREAD RING GAGES 1.25 GO NO GO PD'S = 1.1933 & 1.1849 - DW7140CG

1 1/4 12 UNF 2A LEFT HAND THREAD RING GAGES 1.25 GO NO GO P.D.'S 1.1941 & 1.1879

LC / MERCURY

1 1/4 12 NF 3 THREAD RING GAGES 1.25 GO NO GO P.D.'S = 1.1959 & 1.1888 1.250 - 114122R1

WIDELL

1 1/4 12 UNF 3A THREAD RING GAGES 1.25 GO NO GO P.D.'S = 1.1959 & 1.1913 NF-3A - JF2187MURL