Machine Screws

Machine Screws Available at Gilford Hardware & Outdoor Power Equipment Machine Screw • Intended to be screwed into pre-threaded holes in metal. • Another type is a Thread-Cutting Machine Screw, which has a head that cuts its own threads as it goes into a hole. • May look like a bolt, but user drives it with a screwdriver instead of a wrench. • Thread is measured in threads per inch, or tpi. Comes in coarse (24 threads per inch) and fine (32 threads per inch) sizes. • Can have round, oval, flat and fillister heads. • They are sized according to diameter, thread and length. Example: a 6-32x3/4 means the screw has a 6-gauge diameter with 32 threads per inch and is 3/4” long.