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: M16 Drive Type: Internal Hex Finish: Plain Grade: A4 Head Diameter: 23.67 - 24.33 mm Head Diameter Max: 24.33mm Head Height: 15.57 - 16.00 mm Head Height Max: 16.00mm Head Style: Socket Industry Standard: DIN 912 Item: Socket Cap Screw Key Size: 14 mm Length: 50 mm Material: A4 Stainless Steel Measurement: Metric Origin: Imported Specification: DIN 912 Tensile Strength : 101500 psi Thread Length: 44 mm Thread Type: Coarse Type: Partial Threaded