BSI - BS 4933
Specification for ISO metric black cup and countersunk head bolts and screws with hexagon nuts
|Publication Date:||30 March 1973|
|ICS Code (Bolts, screws, studs):||21.060.10|
|ICS Code (Nuts):||21.060.20|
General dimensions and mechanical properties for cup-head bolts with nibs; cup-head square neck bolts; 90° countersunk-head bolts and screws; 90° countersunk-head square neck bolts with nibs and 90°-120° countersunk-head square neck bolts.