Page 634 - Master Catalog 2017, Inch

TopThread
™
Insert Overview

style
chip thread tolerance
control — K neutral positive profi le standard class cresting application page(s)
General use for 60° thread forms,
such as ISO and UN, where
NT-K NT NTP Partial Profi le 60° – – N F13–F15
non-cresting inserts are desired to
cut a variety of pitches.

Coarse pitch 60° thread forms, such
Partial Profi le 60° as ISO and UN, where non-cresting
NT-CK – – N F15
— coarse pitch inserts are desired to cut a variety
of pitches.
Fine pitch 60° thread forms, such
as ISO and UN, where non-cresting
Partial Profi le 60°
NTF NTK – – N inserts are desired to cut a variety F16
— fi ne pitch
of pitches — able to thread close
to shoulders.

ANSI Widely used inch-based 60° V-form
NTC American UN 2A/2B Y F17
B1.1:74 for all industries.

Controlled root radius on external
NJP UNJ SAEA588791 3A/3B N threads for military and aerospace F18
industries.

Controlled root radius on external
UNJ — threads for military and aerospace
NJK SAEA588790 3A/3B N F18
fi ne pitch industries — able to thread close
to shoulders.

ANSI/ACME National Pipe Thread standard forms
NDC-V NPT B1.201: Standard Y F18
1983 NPT for pipe fi ttings.

ANSI/ACME High-productivity multi-tooth threading
NDC-V-M NPT — multi-tooth B1.201: Standard Y F19
1983 NPT inserts for NPT threads.

BS 84:1956,
Whitworth, ISO 228/1: Medium Widely used 55° form for gas and
NWC-E Y F19
BSW, BSP 1982, Class A water connections.
DIN 259
60° V-form with large radius for casing,
API STD. Standard tubing, and line pipe in the oil and gas
NDC-RD API Round Y F20
5B:1979 API RD industry, including 8 and 10 round
forms.

29° truncated thread form for motion
ANSI
NA Acme 3G N applications in a wide variety of F21
B1.5:1988
industries.
Shallow depth 29° truncated thread
ANSI
NAS Stub Acme 2G N form for motion applications in a wide F22
B1.8:1988
variety of industries.
Sawtooth form for axial load bearing
American Buttress
ANSI
NTB-B — 45° clearance B1.9:1973 Class 2 N applications in a variety of industries — F22
use the “B” style when the 45°
fl ank leading (Pull)
clearance fl ank is the leading fl ank.

F8 widia.com

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