Serrated Flanged Hexagon Nuts (DIN 6923)

What are Flanged Hex Nuts?

Flanged Hex Nuts combine a standard hex nut with an integrated, wide bearing flange. This design eliminates the need for a separate washer, simplifying assembly and providing superior load distribution across a larger surface area. They are particularly effective for use with oversized holes, thin or soft materials, and uneven surfaces.

There are two primary types, distinguished by their locking mechanism:

Serrated Flange Nuts: Feature serrations (teeth) on the underside of the flange. These bite into the mating surface to provide resistance against loosening caused by vibration, making them a value-engineered alternative to a standard hex nut plus a separate lock washer.

Non-Serrated (Plain) Flange Nuts: Have a smooth bearing surface. They are used when the primary requirement is load distribution and a flush, non-marring contact with the material surface is necessary.

ISO Equivalent Standard

The international standard functionally equivalent to DIN 6923 for serrated flange nuts is ISO 4161.

Comparison: Serrated vs. Non-Serrated Flange Nuts

Feature

Serrated Flange Nut

Non-Serrated (Plain) Flange Nut

Primary Function Vibration resistance and load distribution. Load distribution and surface protection.
Locking Action Serrations bite into the contact surface to resist rotation. Provides no inherent locking action; relies on proper torque and thread friction.
Surface Impact May mar or leave indentations on soft surfaces. Non-marring; ideal for finished or delicate surfaces.
Reusability Good, but locking performance may diminish slightly after repeated use. Excellent, with no degradation of the bearing surface.
Best For Applications subject to mild vibration (e.g., automotive trim, machinery panels). Applications requiring a clean finish, frequent disassembly, or where surface damage is unacceptable.

Material Selection Guide

The choice of material determines the nut's strength, corrosion resistance, and suitability for different environments.

Material

Key Characteristics

Ideal Application

Considerations

Zinc-Plated Steel Cost-effective with basic corrosion resistance. Suitable for occasional moisture exposure. General indoor use, dry or controlled environments. Plating can wear. Not for continuous outdoor or corrosive environments.
18-8 (A2) Stainless Steel Good corrosion resistance, resists rust from water and mild chemicals. Outdoor fittings, marine interiors, and damp industrial environments. Offers the best balance of corrosion resistance and cost for most general-purpose applications.
316 (A4) Stainless Steel Excellent corrosion resistance, withstands harsh weather, saltwater, and most chemicals. Marine exteriors, chemical processing, coastal architecture, and highly corrosive environments. Premium material for maximum durability and longevity in aggressive conditions.

General Specifications

Drive: Requires a standard wrench or socket on the hexagonal body.

Installation: Both types are installed by tightening the nut, with serrated nuts requiring slightly higher initial torque to engage the teeth.

Note: Always ensure the flange nut material is compatible with the bolt/boss material to avoid galvanic corrosion.

Download DIN 6923 Dimensions pdf and  DIN 6923 Weight Chart  or views online

 CLICK VIEW ONLINE DIN 6923 Dimensions DIN 6923 weight chart
CLICK DOWNLOAD DIN 6923 Dimensions pdf DIN 6923 weight chart pdf

Active Stock List (All items are currently in stock):

PIC

PRODUCT

SIZE

GRADE

FINISH

THREAD

Serrated Flanged Hexagon Nuts (DIN 6923) - Stainless Steel (A2) M3-M16 A2 Grade Natural Coarse
Serrated Flanged Hexagon Nuts (DIN 6923) - Marine Stainless Steel (A4) M4-M12 A4 Grade Natural Coarse
Serrated Flanged Hexagon Nuts (DIN 6923) - Bright Zinc Plated Steel (Class 6) M3-M20 Class 6 Zinc CR3 Coarse
DIN 6923 Hex Flange Nuts Serrated Class 8 Zinc M3-M20 Class 8 Zinc CR3 Coarse
DIN 6923 Hex Flange Nuts With Serration Class 8 Black Oxide M4-M20 Class 8 Black Oxide Coarse
DIN 6923 CLASS 10 HEX FLANGE NUT WITH SERRATION MEDIUM CARBON STEEL ZINC PLATED M6-M20 Class 10 Zinc CR3 Coarse
Class 10 Black Oxide DIN 6923 Hex Flange Nuts With Serration M6-M20 Class 10 Black Oxide Coarse

Product Real Shot

DIN 6923 - 01

Sorry, this collection is empty.
Continue shopping