BSI - BS 919-4
Screw gauge limits and tolerances - Part 4: Limits of size for gauges for screw threads of unified form diameters 1/4 in and larger
|Publication Date:||31 October 2007|
|ICS Code (Metric screw threads):||21.040.10|
Gauges, setting plugs and check plugs for standard Unified Coarse (UNC), Fine (UNF) and Unified Extra Fine (UNEF) threads (BS 1580:Parts 1 and 2). Go and not go screw plug, solid screw ring, adjustable screw ring, and adjustable screw caliper gauges; double length setting plugs for go and not go adjustable screw ring gauges and single length setting plugs for adjustable screw caliper gauges; go and not go plain plug and caliper gauges for the crest diameters of product threads.