Flange Nut
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WhatsApp us Get a Quote +91 90333 11425 Download catalogue (PDF)JMIKS Fasteners supplies flange nuts in SS 304, SS 316 and SS 202, and in mild steel and high tensile grades, from M3 to M36 and ¼” to 1-1/4″ BSW. The wide flange spreads the load and replaces a separate washer.
Standard : DIN / IS / AISI
Size : Metric : M3 To M36 / BSW : ¼” to 1-1/4”
Material Grade: SS304 | SS316 | SS202 | 4.6 |8.8 | 10.9 | 12.9
Finish : Zinc Plated , HDG , Self finish
A flange nut is a hex nut with a wide round flange at the base. The flange spreads the clamping force and protects the surface, and the serrated type also resists loosening from vibration. The common standards are DIN 6923 and ISO 4161.
Key dimensions of DIN 6923 hex flange nuts in common sizes, in mm. The height includes the flange.
| Size | Thread pitch | Spanner size | Flange diameter | Height |
|---|---|---|---|---|
| M6 | 1.0 | 10 | 14.2 | 6.0 |
| M8 | 1.25 | 13 | 17.9 | 8.0 |
| M10 | 1.5 | 15 | 21.8 | 10.0 |
| M12 | 1.75 | 18 | 26.0 | 12.0 |
| M16 | 2.0 | 24 | 34.5 | 16.0 |
| M20 | 2.5 | 30 | 42.8 | 20.0 |
Typical dimensions as per DIN 6923; refer to the standard for tolerances.
Serrated flange nuts lock better against vibration but mark the surface. Plain flange nuts are better on painted or soft surfaces. Use them with flange bolts for a matching joint.
To DIN 6923, M6 takes a 10 mm spanner, M8 13 mm, M10 15 mm, M12 18 mm and M16 24 mm. Note that the M10 flange nut takes a smaller spanner than a standard M10 hex nut, which takes 16 or 17 mm.
Match the nut class to the bolt, as with ordinary nuts: class 8 with 8.8 bolts and class 10 with 10.9 bolts. With stainless steel bolts, use a flange nut of the same SS grade. Our bolt grade chart explains the classes.
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