Nut

1. Application scenarios
Mechanical manufacturing: equipment assembly, structural connection.
Building/bridge: steel structure fastening.
Automobile/aviation: high strength or anti-loosening parts.
Home appliances/electronics: small nuts (such as M3 and below)

2. Product classification:
Hexagonal nuts: most commonly used, suitable for wrench tightening.
Locking nuts (anti-loosening nuts): such as nylon insert nuts and double nuts, to prevent vibration loosening.
Flange nuts: with flange at the bottom, increase the contact surface and prevent loosening.
Cap nuts: closed at the top, beautiful and dustproof.
Butterfly nuts: manually tightened, no tools required, often used in places that need frequent disassembly.
Material Iron
Category 4.8 Grade 8.8 Grade 10.9
Material Stainless steel
Category 201 304 316