STAINLESS STEEL NON SERRATED FLANGED NUTS DIN 6923

Non‑Serrated Flange Nuts – FAQs

What is a non‑serrated flange nut?

A non‑serrated flange nut is a hexagonal nut with an integral smooth flange on the bearing surface. The flange acts as a built‑in washer, distributing load over a wider area without the need for a separate washer, but without serrations on the underside.

How do non‑serrated flange nuts work?

The smooth flange increases the contact area between the nut and the mating surface, helping to:

  • Distribute clamping force evenly
  • Reduce surface damage compared to serrated flange nuts
  • Eliminate the need for a separate washer

Unlike serrated flange nuts, non‑serrated flange nuts do not provide a mechanical locking action through biting into the mating surface.

When are non‑serrated flange nuts typically used?

Non‑serrated flange nuts are commonly used:

  • Where a washer‑type bearing surface is required
  • In applications where surface finish must be protected
  • On painted, plated, or softer materials
  • In general mechanical and engineering assemblies
  • Where locking is not required, or is provided by another method

How do non‑serrated flange nuts differ from serrated flange nuts?

  • Non‑serrated flange nuts have a smooth bearing surface and are intended for load distribution and surface protection.
  • Serrated flange nuts include teeth that bite into the mating surface to resist loosening under vibration.

If vibration resistance is required, a serrated flange nut or a separate locking method should be considered.

Are non‑serrated flange nuts suitable as a primary fastening nut?

Yes. Non‑serrated flange nuts are suitable for use as primary fastening nuts. The flange improves load distribution, while the nut body carries the mechanical load.

Can non‑serrated flange nuts be reused?

Yes. Non‑serrated flange nuts can be reused, provided the threads and flange face remain in good condition and free from damage.

What thread types do you supply?

We supply non‑serrated flange nuts in metric thread sizes only.

What materials are available?

Our range of non‑serrated flange nuts is available in:

  • Stainless steel A2
  • Stainless steel A4

Are non‑serrated flange nuts known by any other names?

Non‑serrated flange nuts may also be referred to as:

  • Plain flange nuts
  • Smooth flange nuts
  • Non‑locking flange nuts

All describe flange nuts with a smooth, washer‑style bearing surface.

How do I choose the correct non‑serrated flange nut?

When selecting a non‑serrated flange nut, consider:

  • Correct metric thread size and pitch to match the mating fastener
  • Whether surface protection is important
  • Whether vibration resistance is required (if so, consider serrated or locking alternatives)
  • Material selection (A2 or A4) based on corrosion resistance requirements