®
Thread Turning Technical Section
Threading Inserts Standards
Thread Profile
Standard
Thread Class
ISO UN
DIN 13
6g / 6H 2A / 2B
ANSI B1.1-1989 B.S. 84: 1956 ANSI B1.20.1-1983 ANSI B1.20.3-1976 ANSI B1.20.1-1983 ANSI B1.20.1-1983
WHITWORTH
Medium Class
NPT
- - - - - -
NPTF
NPS
NPSM BSPT
B.S. 21: 1957
DIN 477
DIN 477
ACME
ANSI B1.5-1988 ANSI B1.5-1988
3G (EXT), 3G / 2G (INT)
STUB ACME
2G
TRAPEZ ROUND
DIN 103 DIN 405
7e / 7H Class 7 3A / 3B
UNJ
MIL-S-8879C
MJ
ISO 5855
4h/6h, 4H/5H
AMERICAN BUTTRESS
ANSI B1.9-1973
Class 2
SAGENGEWINDE
DIN 513
- - - - - - - - - - - -
PG
DIN 40430 API Spec7 API Spec7 API Spec7 API Spec7
V-0.040
V-0.038R
V-0.050 V-0.055
API ROUND
API Spec Standard 5B
EXTREME – LINE CASING API Spec Standard 5B
BUTTRESS CASING
API Spec Standard 5B
VAM
VAM
HUGHES
HUGHES
PAC
PAC
DIN: Deutsches Institut für Normung ANSI: American National Standards Institute API: American Petroleum Institute B.S.: British Standards ISO: MIL-S: Military Specification NPT: American National Standard Taper Pipe Thread NPTF: National Standard Taper Fuel:Dryseal USA PAC: Pacific Asia Connection NPS: Straight thread,same as NPT without taper NPSM: Free-Fitting Mechanical Joints International Organisation for Standardization
A04-10
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