BSI - BS 919 P4
Screw Gauge Limits and Tolerances Part 4: Limits of Size for Gauges for Screw Threads of Unified Form, Diameters Quarter of an Inch and Larger
|Publication Date:||3 April 1964|
|ICS Code (Special screw threads):||21.040.30|
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.