Insert Overview

c contrhip ol — Kstyle neutral positivethread profi lestandardtolerance classcrestingapplicationpage(s)
NT-KNTNTPPartial Profi le 60°NGeneral 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-CKPartial Profi le 60° — coarse pitchNCoarse pitch 60° thread forms, such as ISO and UN, where non-cresting inserts are desired to cut a variety of pitches.F15
NTFNTKPartial Profi le 60° — fi ne pitchNFine 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
NTCAmerican UNANSI B1.1:742A/2BYWidely used inch-based 60° V-form for all industries.F17
NJPUNJSAEA5887913A/3BNControlled root radius on external threads for military and aerospace industries.F18
NJKUNJ — fi ne pitchSAEA5887903A/3BNControlled root radius on external threads for military and aerospace industries — able to thread close to shoulders.F18
NDC-VNPTANSI/ACME B1.201: 1983Standard NPTYNational Pipe Thread standard forms for pipe fi ttings.F18
NDC-V-MNPT — multi-toothANSI/ACME B1.201: 1983Standard NPTYHigh-productivity multi-tooth threading inserts for NPT threads.F19
NWC-EWhitworth, BSW, BSPBS 84:1956, ISO 228/1: 1982, DIN 259Medium Class AYWidely used 55° form for gas and water connections.F19
NDC-RDAPI RoundAPI STD. 5B:1979Standard API RDY60° V-form with large radius for casing, tubing, and line pipe in the oil and gas industry, including 8 and 10 round forms.F20
NAAcmeANSI B1.5:19883GN29° truncated thread form for motion applications in a wide variety of industries.F21
NASStub AcmeANSI B1.8:19882GNShallow depth 29° truncated thread form for motion applications in a wide variety of industries.F22
NTB-BAmerican Buttress — 45° clearance fl ank leading (Pull)ANSI B1.9:1973Class 2NSawtooth form for axial load bearing applications in a variety of industries — use the “B” style when the 45° clearance fl ank is the leading fl ank.F22

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