Origin: ImportedSocket head cap screws are bolts (cap screws) with a hexagonal recessed driveAlso know as Allen bolts, they are driven with a hex key or Allen wrenchSocket cap screws are popular in tight spaces where an Allen wrench would fit when another type of drive may notCommonly used in machinery and assembliesDiameter: M3 Drive Type: Internal Hex Finish: Plain Grade: A4 Head Diameter: 5.32 - 5.68 mm Head Diameter Max: 5.68mm Head Height: 2.86 - 3.00 mm Head Height Max: 3.00mm Head Style: Socket Industry Standard: DIN 912 Item: Socket Cap Screw Key Size: 2.5 mm Length: 8 mm Material: A4 Stainless Steel Measurement: Metric Origin: Imported Specification: DIN 912 Tensile Strength : 101500 psi Thread Length: 8 mm Thread Type: Coarse Type: Full Threaded