Metric set screws, Allen, Knurled cup point, Alloy steel black oxide finish, 4mm x 0.7mm x 4mm

Screws with no head and machine threads for use in a tapped hole.

Allen (hex socket) drive is a six-sided recess for use with an Allen wrench (hex key).

Knurled cup points have a cup-shaped point with a serrated ridge that helps resist loosening due to vibration in a permanent application on soft or hard surfaces.

A high strength heat treated alloy steel.

A chemically produced coating that leaves the steel surface with a matte black finish and offers mild corrosion resistance.