• Hey Guest!
    British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)

Whitworth / BSW tap and die question???

Share this page

Mind you, you can also use a thread identifier tool, generally has four sides to it, lets you mate it to the thread to see what you have
 
The main difference between a whitworth bolt and a BSW bolt is the head sizes are different for the same size shaft and thread - whitworth bolt heads typically are one size larger.
 
A Whitworth thread and a BSW thread are one and the same.

BSW stands for British Standard Whitworth.

bundyrum.
 
BUNDYRUM said:
A Whitworth thread and a BSW thread are one and the same.

BSW stands for British Standard Whitworth.

bundyrum.
Click to expand...

I guess he meant Whit & BSF. All my spanners are marked with both, for example 1/4W 5/16BSF - and I don't think I've seen a British-made spanner or socket that wasn't.
 
Back
Top