UN, UNC, UNF UNEF, UNS

Unified Inch Screw Threads (UN and UNR Form)

B1.1

Gages & Gaging for United Inch Screw Threads

B1.2

UNJ, UNJC, UNJF, UNJEF, UNJS

Unified Inch Screw Threads (UNJ Thread Form)

B1.15

Screw Threads Gaging Systems for Dimensional Acceptability-inch and Metric Screw Threads (UN, UNR, UNJ, M and MJ)

B1.3

NC-5 HF, NC-5CSF

Class 5 Interference-Fit Thread

B1.12

M

Metric Screw Threads-M profile

B1.13M

Gages and Gaging for Metric M Screw Threads

B1.16M

MJ

Metric Screw Threads-MJ Profile

B1.21M

Gages and Gaging for MJ Series Metric Screw Threads

B1.22M

UNM

Unified Minature Screw Threads

B1.10M

NPT

Pipe Threads, General Purpose

B1.20.1

NPTF, PTF-SAE Short

Dryseal Pipe Threads

B1.20.3

Gaging for Dryseal pipe Threads

B1.20.5

ANPT

Pipe Threads, Taper Aeronautical National Form
Symbol ANPT Design and Inspection Standard

SAE AS71051

NPSM

American Standard Straight Pipe Threads for free-Fitting
Mechanical Joints for Fixtures

B1.20.1

NPSL

American Standard Straight Pipe Threads for Loose-Fitting
Mechanical Joints with Locknut

B1.20.1

NPSC

American Standard Straight Pipe Threads in pipe Couplings

B1.20.1

NPSF

Dryseal American Fuel Internal Straight Pipe Threads

B1.20.3

NPSI

Dryseal American Intermediate Internal Straight Pipe Threads

B1.20.3

NH, NPSH, NHR

Hose Coupling Screw Threads

B1.20.7

NH

Fire Hose Connections

NFPA 1963

NGT, SGT

National Gas Taper Threads

H28/9A

NGO

National Gas Outlet Threads

H28/9A

NGS

National Gas Straight Threads

H28/9A

R, Rc, Rp (BSPT)

British Taper Pipe Threads & Gages (BS-21 obsolete)

ISO 7/2

G (BSPP)

British Straight Pipe Threads & Gages (BS2779 obsolete)

ISO 228-2

BSW, BSF

British Parallel Screw Threads of Whitworth Form

BS84

BA

British Screw Threads

BS 57

ACME 爱克母

Acme Screw Threads, General Purpose

B1.5

ACME-C

Acme Screw Threads, Centralizing

B1.5

STUB ACME

Stub Acme Screw Threads

B1.8

BUTT

Buttress inch Screw threads 7°/45°

B1.9

ANSI/AMO

Microscope Objective Threads

B1.12

AWWA

Underground Service line Valves and Fittings

C800-84

DIN

German Specifications

JIS

Japanese Industrial Standard

ISO

International Standard Organization