Origin: CN(Origin) DIY Supplies: ELECTRICAL Screw Type: Machine Screws Model Number: M3x20 M3x25 M3x30 Material: BLACK STEEL Drive Style: Hex Socket Head Style: Round The RS Pro hexagon head socket cap screws have a narrow head and are perfect for use in hard to reach areas, particularly in machine repair and maintenance.As this range is produced to 12.9 grade black self-colour high tensile steel, they are ideal when corrosion resistance is not required but a stronger more hardened material than 8.8 and 10.9 great steel is required. Features and Benefits Can be used instead of hex bolt when there is less clearance Socket Head Cap Screw – strongest of all head styles Head height is equal to shank diameter Typical Applications Machine tooling and repairSecurity guardingDomestic applicationsFacilities and maintenance applications Note Requires a Hex key / Allen keyWe offer a range of hexagon socket cap screws in self-colour steel, available in various thread sizes and lengths. Refer to the Datasheet and Range Overview download file for details. If self-colour steel is not what you are looking for we also offer hexagon cap head socket screws BZP steel, titanium and A2 (304) and A4 (316) stainless steel all to Din standard 912. Standards Threaded in accordance with Din standard 912 / ISO standard 4762