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UNC - UNF

Short machine taps for UNC and UNF threads

UNC and UNF are the two American standard series: UNC coarse for the normal case, UNF fine where holding force and resistance to vibration matter. A short machine tap produces the finished thread in one pass. It replaces the three-piece set wherever speed matters, and works by hand as well as in the machine.

VÖLKEL offers 20 versions to DIN 352, in HSS-G, from UNC 1/4 x 20 to UNC 1" x 8, plus UNF 1/4 x 28 to UNF 1" x 12. The lead is in form D.

Application advice for VÖLKEL threading tools
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