M4 x 40 Filister Head Hex Socket Screw - Black Finish ISO 7380
0.35 USD
A durable M4 × 40 screw featuring a black hex socket head and a total length of 42 mm, with a 40 mm threaded section. The 7 mm wide head delivers strong torque, while zinc‑coated steel protects against corrosion in tough environments.