Page 670 - Master Catalog 2017, Inch

Laydown Threading
Insert Overview

style
thread tolerance
fl at top profi le standard class cresting application page(s)

Partial General use for 60° thread forms, such as ISO
60 profi le — — N and UN, where non-cresting inserts are desired F49–F50
60º to cut a variety of pitches.

ISO R262,
ISO Metric ISO 6g/6H Y Widely used metric 60° V-form for all industries. F51–F56
DIN 13

American Widely used inch-based 60° V-form for all
UN ANSI B1.1:74 2A/2B Y F57–F60
UN industries.

ANSI/ASME Standard National Pipe Thread standard 60° thread form
NPT NPT N F61–F62
B1.20.1S1983 NPT for pipe fi ttings.

Partial General use for 55° thread forms such as
55 profi le — — N Whitworth, BSW, and BSP where non-cresting F63–F64
55º inserts are desired to cut a variety of pitches.

BS 84:1956,
Whitworth, Widely used 55° form for gas and water
W BSW, BSF, ISO Medium Y F65–F66
BSP 228/1:1982, Class A connections.
DIN 259

60° V-form with large radius for casing, tubing,
API- API STD. Standard
RD API round 5B:1979 API RD Y and line pipe in the oil and gas industry, F67
including 8 and 10 round forms.

PG PG DIN 404B0 Y 80° steel conduit thread. F67

Round thread form for tube fi ttings in the
RD Round DIN 405 7e/7H Y F68–F69
chemical and food industries.

30° truncated metric thread form for motion
TR Trapez DIN 103 7e/7H N F70–F71
applications.

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