DIN 6923 Flange Nut: Standard, Dimensions, and Tolerances

DIN 6923 flange nuts are widely used in machinery, automotive, and structural applications. These nuts feature a built-in flange at the base that distributes pressure over a larger surface area, helping to prevent loosening and eliminating the need for a separate washer.

As a professional nut supplier, XINCHI is glad to share the DIN 6923 flange nut standard, dimensional and tolerance requirements, compatible bolt types, and what Xinchi Fasteners can offer in terms of stock availability and customization.

DIN 6923 Flange Nut Standard Requirements

The DIN 6923 flange nut is a hex nut with a wide flange that acts as an integrated washer. These nuts are available with either a smooth flange or a serrated flange. The serrated design provides added resistance to loosening under vibration, while the smooth type is better for surfaces that need to remain unmarred.

Key specifications under the DIN 6923 standard include:

• Metric thread sizes typically range from M5 to M24
• Common property classes: 8, 10, and 12 for carbon steel; A2-70 and A4-80 for stainless steel
• Surface treatments such as zinc plating, black oxide, and hot-dip galvanizing
• Metric coarse threads by ISO 261 and ISO 965

These nuts are not self-locking by design but offer mechanical advantages when combined with proper assembly techniques or serrated features.

DIN 6923 Flange Nut Dimensions and Tolerances

Strict measurements define each DIN 6923 flange nut size to ensure consistency and reliability during assembly.

• M5 flange nut: Width across flats is 8 mm, flange diameter approx. 11.8 mm, height 5 mm, thread pitch 0.8 mm
• M6 flange nut: Width 10 mm, flange diameter 14.2 mm, height 6 mm, pitch 1.0 mm
• M8 flange nut: Width 13 mm, flange diameter 17.9 mm, height 8 mm, pitch 1.25 mm
• M10 flange nut: Width 15 mm, flange diameter 21.8 mm, height 10 mm, pitch 1.5 mm
• M12 flange nut: Width 18 mm, flange diameter 26.0 mm, height 12 mm, pitch 1.75 mm
• M16 flange nut: Width 24 mm, flange diameter 34.5 mm, height 16 mm, pitch 2.0 mm

Thread tolerance is classified as 6H per ISO 965, while the flat-to-flat width usually allows for ±0.2 mm. Flange face flatness and perpendicularity follow ISO 4759-1, ensuring proper seating on the surface and maintaining consistent preload in bolted joints.

Compatible Bolts for DIN 6923 Flange Nut Assembly

To ensure a secure and long-lasting connection, DIN 6923 flange nuts are usually paired with standard metric bolts. The most common compatible bolt standards include:

• DIN 933 / ISO 4017 – Hex head bolts, full thread
• DIN 931 / ISO 4014 – Hex head bolts, partial thread
• DIN 912 – Socket head cap screws

When selecting bolts, it’s important to match strength grades with the corresponding nut. For instance, Class 10 nuts should be used with 10.9 bolts to prevent failure under load.

Xinchi Fasteners’ Supply Range of DIN 6923 Flange Nuts

At Xinchi Fasteners, we provide a wide selection of DIN 6923 flange nuts, with both standard inventory and custom manufacturing capabilities. Whether you’re sourcing for construction, automotive, or equipment applications, we support various specifications to meet your project needs.

Standard stock includes:

• Sizes from M5 to M24
• Carbon steel in Class 8 and Class 10
• Finishes: zinc-plated (white/blue), black oxide

Custom options available:

• Sizes up to M36 or inch-equivalent
• Stainless steel (A2-70, A4-80)
• Hot-dip galvanizing, Dacromet, or custom coatings
• Smooth or serrated flange types
• Logo marking, small-batch packaging, OEM branding

Our factory uses high-precision cold-forming equipment and automated inspection tools to ensure each batch meets exact quality standards. We also support fast delivery for urgent orders.

Why Choose DIN 6923 Flange Nuts from Xinchi Fasteners

DIN 6923 flange nuts offer a practical solution for fastening applications that require improved load distribution or vibration resistance. With standardized dimensions, dependable material grades, and compatibility with common bolt types, they remain a preferred choice in many industries.

XINCHI is a trustworthy fastener company, especially in furniture nuts. We have a factory,  founded in 2007. We are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier, XINCHI offers a wide range of high-quality fasteners, including nuts, screws, bolts, rivets, and washers. If you would like to learn more about fasteners or are interested in wholesale fasteners, please do not hesitate to contact us. Our experienced and expert service team will reply as soon as possible.

At Xinchi Fasteners, we combine in-house manufacturing with strict quality control and responsive service. Whether you need standard parts or customized specifications, we’re ready to help. Contact us today for pricing, lead times, or technical support.