Machine Screws

Machine screws are the precision fasteners used for bolted connections in metal, through tapped holes, threaded inserts, and nuts across engineering, electronics, and mechanical assembly applications. At the DIY Hardware Store, our machine screws range covers the most commonly used metric head styles and thread sizes, in zinc-plated steel and stainless steel, for general engineering and assembly use.

Unlike woodscrews, machine screws have a uniform parallel thread along their full length (or from a defined point below the head), designed to engage with a matching internal thread rather than forming their own. The head style - countersunk, pan head, cheese head, or socket cap - determines the application: countersunk for flush surface finishing, pan head for general exposed fastening, socket cap for high-torque precision applications. Metric sizes from M2.5 through to M10 cover the vast majority of applications encountered in domestic engineering and light commercial assembly.

  • Parallel metric threads for tapped holes, inserts, and nuts
  • Countersunk, pan head, cheese head, and socket cap styles
  • Metric sizes M2.5 to M10 for engineering and assembly
  • Zinc-plated steel and stainless steel options
  • Pozi, Phillips, slot, and hex socket drive options
  • Used in electronics, machinery, and light engineering assembly