Countersunk Cap 4BA x 3/8 Black Gr.10.9 BS 2470

Countersunk Cap Screw
Hexagon Head
Black Imperial BA
High Tensile Grade 10.9
Dia: 4BA
TPI: 38.5
Length: 3/8'
BS 2470
Key Size: 1/16'
A BA countersunk head shoulder cap screw is a specialized imperial fastener that combines a flush-fitting head with an unthreaded shoulder. This hybrid design is primarily a custom or non-standard item, as standard BA fasteners typically feature either a countersunk head (for flush finish) or a shoulder (for pivoting) but not both in a standard configuration.