BS 3A 109:2024 AEROSPACE SERIES Bolts, shear, hexagonal heads, close tolerance shank, unified threads, alloy steel, cadmium plated (on head and thread only). Specification-Classification Rm = 127 600 – 156 600 lbf/in2 (880 to 1080 MPa) at ambient temperature | +190°C

standard by BSI Group , 02/22/2024