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: M4 Drive Type: Internal Hex Finish: Plain Grade: A4 Head Diameter: 6.78 - 7.22 mm Head Diameter Max: 7.22mm Head Height: 3.82 - 4.00 mm Head Height Max: 4.00mm Head Style: Socket Industry Standard: DIN 912 Item: Socket Cap Screw Key Size: 3 mm Length: 14 mm Material: 316 (A4) Stainless Steel Measurement: Metric Origin: Imported Specification: DIN 912 Tensile Strength : 101500 psi Thread Length: 14 mm Thread Type: Coarse Type: Full Threaded