BS

Specification for 100 degrees countersunk head steel bolts (Unified threads) for aircraft
standard by BSI Group, 06/04/1962

Specifications for machine screws and nuts (Unified threads) below 3/16 inch for aeronautical purposes
standard by BSI Group, 04/29/1963

General requirements for steel protruding-head bolts of tensile strength 1250 MPa (180000 lbf/in2) or greater. Specification
standard by BSI Group, 05/18/2005

Bolt, 100 degrees Countersunk head, Hi-Torque speed drive recess, UNJF thread , split pin hole option, titanium alloy, various finishes, Classification: 80 Tf/in^2 (1 100 MPa) at T$dA/+315 degreesC
standard by BSI Group, 02/29/2016