What are the classification of stainless steel non-standard parts?

Classification of stainless steel non-standard parts:

1. Non standard bolt: flange bolt, stainless steel hexagon bolt, square head  suspension ring, bracket bolt, American disc head hexagon screw, T-bolt, flat head hexagon screw, American flat head hexagon screw, hexagon screw, American flat head, fine tooth screw, extra long screw, etc

2. Stainless steel non-standard parts manufacturers introduce non-standard screws: Hexagon socket screw, fastening screw, self tapping screw, drilling screw, mechanical screw, combination screw, throat plug, spring clip, American throat plug, etc.

3. Non standard nut: square nut, hex nut, disc nut, flange nut, lock nut, K nut, cover nut, furniture nut, welding nut, etc.

4. Non standard washer  retaining ring: stainless steel shaped spring washer, flat washer, checkered washer, etc.

5. Non standard rivets: pop rivets, riveting series, rivet nuts, blind rivets, etc.

6. Other categories: building hardware, non-standard curtain wall accessories, threaded sheath, building fasteners, plastic screws, devices, etc.