Quizzes & Puzzles1 min ago
Screw threads
6 Answers
I know of. B.S.F, Whitworth and metric, is there any other type please?
Answers
Best Answer
No best answer has yet been selected by druiaghtagh. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.