We stock the full range of machine screws in pozi and slotted drive types, covering countersunk, pan, cheese, and raised countersunk head profiles. Available in zinc plated steel, stainless steel A2 and A4, and brass, in sizes from M2 to M8. Machine screws are used with tapped holes or nuts in light assembly, electrical enclosures, and instrument work. Our range also includes thumb screws and wing screws for hand-tightened applications.
What is the difference between a machine screw and a self-tapping screw?
Machine screws have a parallel metric thread (like a bolt) and require a pre-tapped hole or a nut to fasten into. Self-tapping screws cut or form their own thread as they are driven into an untapped hole. Machine screws are used where precise, repeatable assembly is needed, while self-tappers suit sheet metal and one-off fixings.
Should I use pozi or slotted machine screws?
Pozi drive (crosshead) machine screws are generally preferred for production assembly because the driver centres automatically, reducing cam-out. Slotted screws are still widely used in electrical work, restoration, and applications where a traditional appearance is required. Both drive types are available across all head styles.
What head type should I choose for a flush finish?
Countersunk machine screws (DIN 965 pozi or DIN 963 slotted) sit flush with the surface when used with a countersunk hole. Raised countersunk screws (DIN 966) provide a slightly domed, decorative finish above a countersunk hole. Pan and cheese head types sit proud of the surface and are used where flush mounting is not required.
