Multi-part Document
BS 3643 - ISO metric screw threads. Limits and tolerances for fine pitch threads (constant pitch series)

This is a multi-part document divided into the following parts:

• Part 1 ISO metric screw threads. Thread data and standard thread series
• Part 2 ISO metric screw threads. Limits and tolerances for commercial bolt. Nut and machine screw threads
• Part 3 ISO metric screw threads. Limits and tolerances for fine pitch threads (constant pitch series)