Straight Flute : Short Machine & Hand Taps, Long Shank Machine Taps, Long Shank Nut Taps & Nib Taps.Spiral FluteSpiral Point Taps :Thread Form : BSW, BSF, UNF, UNC, BA, BSP, NPS, BSPT, NPT, NPTF, NGT, BSCY, ACME, Interrupted & Spl. Threads.Standard Specification : IS: 6175 1977 PART I II & III, BS:949, ANSI:B. 94. 9, DIN 352-371-376Product Range : 18" to 4" (M 3 to M 100) and Spl. on order