
Top Notch GROOVING & THREADING INSERTS Style Thread Tolerance Standard Cresting Application Page(s) Chip Profile Class Neutral Positive Control — K TURNING General use for 60° thread forms, such as ISO and UN, NT-K NT NTP Partial Profile 60º – – N where non-cresting inserts are desired to cut a variety 24, 27 of pitches. Coarse pitch 60° thread forms, such as ISO and UN, Partial Profile 60º NT-CK – – N where non-cresting inserts are desired to cut a variety 27 — coarse pitch of pitches. Fine pitch 60° thread forms, such as ISO and UN, Partial Profile 60º NTF NTK – – N where non-cresting inserts are desired to cut a variety 26, 27 — fine pitch of pitches — able to thread close to shoulders. Partial Profile 60º Four-edged insert for 60º partial profile threading — NTU – – N 26 — fine pitch requires NSU-style toolholder for size 4U insert. NTC-M Metric ISO ISO R262, 6g/6H Y Widely used metric 60° V-form for all industries. 26 DIN 13 NTC American UN ANSI 2A/2B Y Widely used inch-based 60° V-form for all industries. 25 B1.1:74 Controlled root radius on external threads for defense NJ NJP UNJ MIL-S-8879C 3A/3B N 22 and aerospace industries. Controlled root radius on external threads for NJF NJK UNJ — fine pitch MIL-S-8879C 3A/3B N defense and aerospace industries — able to 23 thread close to shoulders. ANSI/ACME Standard NDC-V NPT B1.201: NPT Y National Pipe Thread standard forms for pipe fittings. 29 1983 NDC- NPT — ANSI/ACME Standard High-productivity multi-tooth threading inserts for B1.201: NPT Y 28 V-M multitooth 1983 NPT threads. Whitworth, BS 84:1956, Medium NWC-E ISO 228/1:1982, Class A Y Widely used 55° form for gas and water connections. 29 BSW, BSP DIN 259 API Rotary Shoulder 60º V-form used for rotary shoulder pipe connections ND Connections — API SPEC. Standard N in the oil and gas industry including V-.038R, V-.040, 28 7:1990 API partial profile and V-.050 forms. 60º V-form used for rotary shoulder pipe connections API Rotary Shoulder API SPEC. Standard in the oil and gas industry including V-.038R, V-.040, NDC Connections — 7:1990 API Y 28 and V-.050 forms — complete cresting form cresting including taper. 60° V-form with large radius for casing, tubing, and line NDC- API STD. Standard API Round 5B:1979 API RD Y pipe in the oil and gas industry, including 8 and 10 32 RD round forms. NDC- API Round — API STD. Standard High productivity multitooth threading inserts for API 5B:1979 API RD Y 30 RD-M multitooth round threads. ANSI 29° truncated thread form for motion applications in a NA Acme B1.5:1988 3G N 30 wide variety of industries. ANSI Shallow depth 29° truncated thread form for motion NAS Stub Acme B1.8:1988 2G N 31 applications in a wide variety of industries. American Buttress Sawtooth form for axial load bearing applications in a NTB-A — 7° clearance ANSI Class 2 N variety of industries — use the “A” style when the 7° 31 B1.9:1973 flank leading (Push) clearance flank is the leading flank. American Buttress Sawtooth form for axial load bearing applications in a NTB-B — 45° clearance ANSI Class 2 N variety of industries — use the “B” style when the 45° 32 B1.9:1973 flank leading (Pull) clearance flank is the leading flank. kennametal.com 21