BS 2A 266 to 2A 271:2016+A1:2019
Aerospace Series. Bolt, 100° Countersunk head, Hi-Torque speed drive recess, close tolerance shank, UNJF thread, split pin hole option, titanium alloy, various finishes. Classification: Rm 1100–1250 MPa (160 000–180 000 lbf/in2) at Ambient Temperature | +315 °C
