Cylindrical head with an internal hexagonal Allen drive, allowing for tightening in narrow spaces where wrench access is limited
Hardened, quenched, and tempered alloy steel, typically with a black oxide finish for dry environments, or zinc plating.
Ideal for heavy-duty machinery, high-stress automotive applications where maximum strength is required.
Grade 12.9
Pitch = 0.5mm
Use Allen Key size = 2.5mm
