RS PRO Steel Grub Screw, M4 x 4 mm, Plain Cup Point, DIN 916, Black, 529-933

RS PRO 529-933 steel grub screw is engineered for precise machine fastening and industrial assembly tasks requiring a strong and flush-set fastener. The headless design, also known as a set or blind screw, allows for insertion into pre-threaded holes, keeping the screw surface level and reducing the risk of interference or snagging in operation.

This screw is manufactured from high-grade steel, rated at strength class 14.9, ensuring exceptional toughness for mechanical repairs and equipment maintenance in industrial environments. The black finish provides basic corrosion resistance, while the metric M4 thread and 4 mm length enable easy integration into precise engineering setups.

The plain cup point, a concave form at the end of the screw, delivers secure contact without damaging mating components. It is especially effective where parts are repositioned or where repeated tightening and loosening are required. The compliance with DIN 916 makes it universally compatible for repair and replacement in existing machinery worldwide that adheres to this specification.

Commonly, the 529-933 grub screw is employed in machine tooling, electronic assemblies, security guarding, and automotive components. The Allen (hex socket) drive allows for efficient insertion and removal using a standard hex key, even in flush or recessed conditions where traditional screw heads are unsuitable.

Applications span across industrial equipment assembly, panel mounting, jigs and fixtures, and general maintenance in manufacturing, process industries, and automated systems. The plain cup point type is designed for resettable or frequently serviced joints, making it a staple in maintenance kits and workshop environments.

Choose RS PRO for a reliable, high-quality fastening solution suitable for demanding industrial, electronics, and mechanical use cases. Shop the EnvMart range for a complete selection of metric and imperial Grub Screws, set screws, and fastener accessories from RS PRO and other leading brands.