SBAC RS 678 Issue 6 (2013)
SBAC RS 678 Issue 6 (2013) Fasteners, Rolled Threads, Chamfers, Lead Threads & Runouts Describes requirements for thread chamfers, lead threads and thread runouts for rolled threaded fasteners and similar parts, with Unified UNJ threads No. 4-40 to 1.500"-12 to BS A 346 (ISO 3161) and M