Unified Thread Gauges

Unified Thread Gauges

Unified Threads are used for general purpose fastening applications for Imperial system of units.

Specification :

We manufacture Unified Gauges as per American Standard : Basic Dimensions as per ANSI B 1.1:2003 & Gauging Practice as per ANSI/ASME B 1.2-1983.
We also manufacture Unfied Gauges as per British Standards (BS).Basic Dimensions as per BS 1580 Part 1 & 2 - 2007 & Gauging Practice as per BS 919 Part 1-2007.

Manufacturing Range :

Thread Plug & Ring Gauges from No. 4 (0.112") to 12"

Gauge Type Diameter Range (Inch) TPI (Threads per Inch) Tolerance Class
Thread Plug Gauges. No.4 (0.112"-12") 48, 44, 40, 36, 32, 28, 24, 20, 18,
16, 14, 13, 12, 11.5, 11, 10, 9, 8,7,6, 5, 4.5, 4 TPI not covered here can be supplied based on customer request
As given in below Table
Thread Ring Gauges. No.4 (0.112"-10.25") 48, 44, 40, 36, 32, 28, 24, 20, 18, 16, 14, 13, 12, 11.5,11,10, 9, 8,7,6, 5, 4.5, 4 TPI not covered here can be supplied based on customer request. As given in below Table
Plain Plugs To check Minor Diameter of Internal Threads as per above Diameter range.
Plain Rings To check Major Diameter of External Threads as per above Diameter range.
Check Plug Gauges To check NEW Go & Nogo Ring Gauges as given above.
Wear Check Plug Gauges To check / calibrate USED Go & Nogo Ring Gauges as given above.
Check Ring Gauges To check NEW Go & Nogo Plug Gauges as given above.
Wear Check Ring Gauges To check / calibrate USED Go & Nogo Plug Gauges as given above.

Tolerance Class

Tolerance Class for Plug gauges (Internal threads)

Tolerance Class for Ring gauges (External threads)

Application

1B 1A Where quick assembly is needed, even when threads are dirty / damaged. Wide tolerances for male and female threads.
2B 2A Corresponds to medium fit and used for general applications, which requires free assembly.
3B 3A Where closer fit is required.

*We manufacture AG class Thread Ring Gauges for lubricant and high temperature applications as recommended in B.S. 1580, Part I & II 1962 specification.