Relates to parallel screw threads having the British Association (B.A) form of trhead. It covers: basic sizes for B.A. threads, sizes 0 B.A. to 25 B.A.; and limits and tolerances for close and normal classes of bolt, sizes 0 B.A. to 10 B.A.
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Edition: 4th Published: 01/01/1953 Number of Pages: 0
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