A nut is a component used to securely fasten mechanical equipment together. Through the internal threads, a nut and a bolt of identical specifications can be joined; for instance, an M4-P0.7 nut can only be paired with a bolt from the M4-P0.7 series (in this designation, M4 indicates an approximate internal diameter of 4mm, while 0.7 indicates a thread pitch-the distance between two adjacent thread crests-of 0.7mm). The same principle applies to US-standard products; for example, a 1/4-20 nut can only be paired with a 1/4-20 bolt (where 1/4 indicates an approximate internal diameter of 0.25 inches, and 20 indicates a thread count of 20 threads per inch).
Stainless Steel
Self-locking nuts, anti-loosening nuts, locking nuts, four-prong nuts (T-nuts), screw-in nuts, safety nuts, connecting nuts for slender rods, self-locking hexagonal cap nuts, specialized nuts for anchor bolts, hexagonal castellated thin nuts, eye nuts.
Fine-pitch all-metal hexagonal flange lock nuts, all-metal hexagonal flange lock nuts, fine-pitch hexagonal flange lock nuts with non-metallic inserts, fine-pitch hexagonal flange nuts.
Square weld nuts, hexagonal weld nuts, clinch nuts, insert round nuts.
Slotted round nuts, round nuts with side holes, round nuts with face holes, small round nuts.
Round nuts, ring nuts, wing nuts (butterfly nuts).
Copper Materials
Copper nuts, embedded copper nuts, knurled copper nuts, insert copper nuts, injection-molded copper nuts, etc.
Alloys
Zinc-copper alloy nuts, etc.
