STI thread gauges for UNC, Unified coarse thread

UNC is the standard series for screws and nuts in the USA and Canada. Nominal diameters are given in inches and as gauge numbers, the pitch as threads per inch. STI gauges check the oversized thread that later receives a thread insert. It is a series of its own, because the receiving thread is larger than the working thread that follows.

VÖLKEL offers 46 versions, from UNC No. 2 x 56 to UNC 1.1/2 x 6.

46 products found