BSW / BSF / Whits Thread Gauges

BSW/ BSF/ Whits Thread Gauges

BSW / BSF / Whitworth threads are used where clerance between male & female threads is to be controlled.
This uses Imperial system of units.

Specification :

Basic Dimensions- BS 84-2007 & Gauging Practice: BS 919 Part II - 2007.

Manufacturing Range :

Thread Plug & Ring Gauges from Diameter 1/8 to 6" , TPI 40 to 2.5

Dia Inch BSW BSF BSB Type of Thread Gauges used
1/8 40 - 26 Thread Plug Gauges. Plain plugs
to check tapped holes/ minor diameter
Thread
Ring Gauges.
Check
Plug Gauges to Check
New Rings.
Wear
Check Plug Gauges to Check / Calibrate
used Rings.
3/16 24 32 26
* 7/32 - 28 *
1/4 20 26 26
5/16 18 22 26
3/8 16 20 26
7/16 14 18 26
1/2 12 16 26
*9/16 12 16 26
5/8 11 14 26
*11/16 11 14 *
3/4 10 12 26
7/8 9 11 26
1 8 10 26
1.1/8 7 9 26
1.1/4 7 9 26
*1.3/8 - 8 26
.1/2 (6) (8) 26
1.3/4 (5) (7) 26
2 (4.5) (7) 26
2.1/4 (4) (6) *
2.1/2 (4) (6) *
2.3/4 (3.5) (6) *
3 (3.5) (5) *
*3.1/4 (3.25) (5) *
3.1/2 (3.25) (4.5) *
*3.3/4 (3) (4.5) *
4 (3) (4.5) *
4.1/2 (2.875) (4) *
5 (2.75) - *
5.1/2 (2.625) - *
6 (2.5) - *

Tolerance Class

Internal Threads -Plug External Threads - Rings
Medium Class Medium Class
Normal Class Free Class
Close Class Close Class

• Gauges of TPI in parenthesis are supplied in Truncated Form.
• We also manufacture Gauges of diameter & TPI combination not covered above (Whitworth), based on customer request.