304 stainless steel flange nut

The fastening and opening of bolts and nuts adopts non-standard design, and the matching
non-standard tools are used to solve the opening and fastening problems. In general, other
wrenches cannot be inserted. In the appearance design of nuts and bolts, non-standard slotting,
opening or pentagonal, heptagonal, nine-corner or custom-made corresponding groove tools
have played a very good anti-theft effect

冷間圧造加工は、切削の少ない、あるいは切削を必要としない新しい圧造加工のひとつである。
金属。の作用による金属の塑性変形を利用した加工法である。
外力を受け、金型の助けを借りて、金属の体積を再分配し、移動させる。
必要な部品やブランクを製造します。冷間圧造工程は、標準的な
ボルト、ネジ、ナット、リベット、ピンなどの留め具。

304 Stainless Steel Flange ナッツ – Complete Overview

1. Definition & Purpose

A 304 stainless steel flange nut is a hex nut with an integrated circular flange that acts as a built-in washer. It is made from Type 304 (A2) austenitic stainless steel, offering excellent corrosion resistance, durability, and moderate strength.

The “304” designation refers to its material composition (18% chromium, 8% nickel), while “flange” indicates its wide, load-distributing base.

2. Material Properties

• Corrosion Resistance:

  • Resists rust, oxidation, and mild chemicals.

  • Suitable for food processing, marine, and outdoor applications (but not constant saltwater exposure—316/A4 is better).

• Non-Magnetic (Mostly):

  • Generally non-magnetic but may become slightly magnetic after cold forming.

5. Standards & Compliance

• ISO 3506 (Stainless steel fastener mechanical properties).

• DIN 6923 (Metric serrated flange nuts).

• ASME B18.2.2 (Imperial flange nuts).

• FDA Compliance (For food-grade applications).

8. Limitations

• Not for Extreme Chloride Exposure (e.g., seawater immersion—choose 316/A4 instead).

• Lower Strength than high-grade alloy steel nuts.

• Higher Cost than zinc-plated or carbon steel nuts.

Conclusion

The 304 stainless steel flange nut is a versatile, corrosion-resistant fastener ideal for moderate-strength applications where rust prevention and vibration resistance are key. It is widely used in automotive, construction, food processing, and plumbing.

For harsher environments (e.g., seawater, acids), consider 316/A4 stainless steel flange nuts.