NXF UNS S304/ 1.4301/SUS304/Z7CN18-09 M1-60 Grade 4-12 304 Stainless Steel Fastener Hexagon Head Thin or Heavy Heavy Nut

The whole‑manufacturing workflow for 304 stainless‑steel hexagon head nuts follows standardized cold‑forging and precision‑machining procedures, with strict material inspection carried out before production.

1.First, raw 304 stainless‑steel wire rods are delivered. Workers conduct chemical composition inspection and surface‑defect check. Qualified steel wires go through wire drawing to acquire accurate outer diameter, removing oxide scale and improving material surface finish.

2.The second step is cold heading. The treated steel wire is cut into fixed‑length blanks. Automatic cold‑forging machines stamp blanks into hexagonal nut blanks at room temperature. Cold forging strengthens the metal grain structure, enhancing the nut’s tensile strength and wear‑resistance.

3.Next comes thread tapping. Hexagonal semi‑finished products are fixed on tapping machines. High‑precision taps cut standard inner threads. Every thread needs smooth texture and qualified tolerance to perfectly match matched bolts.Subsequent processing includes deburring and passivation. Burrs on hex edges and thread openings are removed by vibration grinding. Then nuts receive stainless‑steel passivation treatment. This procedure builds a dense protective oxide‑film and greatly improves corrosion‑resistance capacity for 304 nuts.

4.After‑treatment procedures cover sorting, quality testing and packaging. Inspectors test thread tolerance, hardness, dimension accuracy and surface condition. Defective goods are screened‑out. Certified finished nuts are packed according to specifications.