Insert Overview Widia TopThread style thread profile standard tolerance class cresting application page(s) chip control K neutral positive NT-K NT

Insert Overview Widia TopThread style thread profile standard tolerance class cresting application page(s) chip control K neutral positive NT-K NT d NTP s Partial Profile 60° N General use for 60° thread forms, such as ISO and UN, where non-cresting inserts are desired to cut a variety of pitches. F13-F15 NT-CK Partial Profile 60° coarse pitch N Coarse pitch 60° thread forms, such as ISO and UN, where non-cresting inserts are desired to cut a variety of pitches. F15 NTF & NTK E Partial Profile 60° fine pitch N Fine pitch 60° thread forms, such as ISO and UN, where non-cresting inserts are desired to cut a variety of pitches able to thread close to shoulders. F16 NTC 4 American UN ANSI B1.1:74 2A/2B Y Widely used inch-based 60° V-form for all industries. F17 NJP d UNJ SAEA588791 3A/3B N Controlled root radius on external threads for military and aerospace industries. F18 NJK z UNJ fine pitch SAEA588790 3A/3B N Controlled root radius on external threads for military and aerospace industries able to thread close to shoulders. F18 NDC-V 4 NPT ANSI/ACME B1.201 1983 Standard NPT Y National Pipe Thread standard forms for pipe fittings. F18 NDC-V-M NPT multi-tooth ANSI/ACME B1.201 1983 Standard NPT Y High-productivity multi-tooth threading inserts for NPT threads. F19 NWC-E Whitworth, BSW, BSP BS 84:1956, ISO 228/1 1982, DIN 259 Medium Class A Y Widely used 55° form for gas and water connections. F19 NDC-RD API Round API STD. 5B:1979 Standard API RD Y 60° V-form with large radius for casing, tubing, and line pipe in the oil and gas industry, including 8 and 10 round forms. F20 NA Acme ANSI B1.5:1988 3G N 29° truncated thread form for motion applications in a wide variety of industries. F21 NAS Stub Acme ANSI B1.8:1988 2G N Shallow depth 29° truncated thread form for motion applications in a wide variety of industries. F22 NTB-B American Buttress 45° clearance flank leading (Pull) ANSI B1.9:1973 Class 2 N Sawtooth form for axial load bearing applications in a variety of industries use the B style when the 45° clearance flank is the leading flank. F22 F8