Tall hexagon nut with collar

Tall hexagon nuts with collar (flange) are made to the German standard DIN 6331 and have no equivalent in domestic production. They are manufactured from carbon steel, zinc-electroplated steel, and stainless steel grades A2 type 12×18N10 (food-grade stainless steel) and A4 type 03×17N14M2 (acid-resistant austenitic steel).

This type of nut is used for fastening parts that require frequent tightening and loosening. Internal metric thread diameter: M8–M36. Larger nuts are also produced, with thread diameters of M42 and M48. Fastener height: 12–55 mm. Outer diameter: 13–55 mm. Property classes of the fastener: 8 and 10. Recommended for use with threaded studs, bolts and screws of matching thread size.

Main application areas: production of machine tooling and fixtures, metallurgy, instrument engineering and other manufacturing fields. High-strength nuts are suitable for aggressive environments (moisture, dampness, alkali, acid), increased loads on fasteners, and extreme temperatures.

FLOK supplies DIN 6331 — a tall hexagon nut with flange (collar), height ~1.5 d.