About

Diameter: 4mm
Bolt Length: 6mm
Material: Mild Steel (Black oxide)

The M4 x 6mm Grub screw is 4mm in diameter and 6mm long. Made from Mild Steel material the grub screw has a black oxide finish that will protect it from any sort of corrosion.

A grub screw is generally used to secure an item against another item. It is commonly used as a locking device, particularly on custom modified Gears, pillow ball bearings, taper locking bushes, pulleys or adjusting rings.

Grub Screws are designed with a hexagonal internal drive in the head, allowing them to be tightened and loosened with an Allen key.

Precision Engineering and Durability

These M4 x 6mm grub screws are engineered for demanding mechanical applications. The mild steel construction provides a tensile strength between 400-600 MPa and standard hardness, ensuring reliability under moderate loads. Its headless design allows components to sit flush, making it ideal for compact assemblies or where smooth surfaces are required.


Black Oxide Finish for Enhanced Protection

A premium black oxide coating enhances the screw's resistance to corrosion, offering moderate protection in controlled environments. The attractive black finish also helps prevent glare and enhances the overall aesthetic of your assembly, making it suitable for visible applications as well as functional ones.


Convenient Installation and Versatile Usage

Thanks to the hex socket drive, installation is quick and easy with a standard hex or Allen key. These grub screws are widely used to fasten and secure collars, gears, and pulleys onto shafts or in any application where precise alignment and firm holding are essential. Their compact size (4mm diameter, 6mm length) makes them perfect for applications with tight space restrictions.