DIN 6331 High Hexagon Nut with Flange (Collar), Height ~ 1.5 d
FLOK supplies high hex flange nuts DIN 6331, M6–M48, steel property class 8 and 10, stainless steel A2/A4, zinc coating.
DIN 6331 is the manufacturing standard for a high nut fitted with a flange (also called a collar). A distinctive feature of these products is the diameter-to-height ratio of 1 to 1.5. The increased height provides a stronger joint and more reliable fixation of the fastener in the hole due to a greater number of thread turns.
The additional flange eliminates the need for washers and lock washers: the flange increases the contact surface with the material and prevents damage.
Materials
High nuts of this type are used for reliable connection of various assemblies and units of mechanisms and machinery, which is why they are subject to increased requirements. They are made from carbon steel with property class 8 and 10 – high-strength materials designed for constant heavy loads. The metal is coated with zinc, applied by the galvanic method.
Stainless steel grades A2 and A4 are also used to manufacture flange nuts: this material is designed for prolonged exposure to aggressive environments, as the alloy is not subject to corrosion. It contains various alloying elements: zinc, molybdenum, nickel, which prevent the metal from degrading.
Technical specifications
Fasteners of this type are manufactured according to the following standard characteristics:
- The nominal thread diameter of the products ranges from M6 to M48, a wide size range.
- The overall height of the nut, including the flange, ranges from 9 to 72 mm.
- The width across flats can range from 10 to 75 mm.
- The size of the attached flange can range from 14 to 91 mm.
Such a wide size range allows selecting fasteners with the required dimensions for use in any conditions. The nut can have a flat or serrated flange surface: the latter provides a more reliable connection with the surface, protected against self-loosening.
Application options
They are used in mechanical engineering, machine tool building, instrument making and other fields, including the production of automobiles and special equipment. These fasteners can be used together with thin sheet materials and protect them from damage.
FLOK supplies high hex flange nuts DIN 6331 in batches of any volume in accordance with the standard.
Dimensions of high hex flange nuts (with collar) DIN 6331 in mm:
| d | d₁ | m | s |
|---|---|---|---|
| M8 | 18 | 12 | 13 |
| M10 | 22 | 15 | 16 |
| M12 | 25 | 18 | 18 |
| M16 | 31 | 24 | 24 |
| M20 | 37 | 30 | 30 |
| M24 | 45 | 36 | 36 |
| M30 | 58 | 45 | 46 |
| M36 | 68 | 55 | 5 |
| d | k | d₁ | m | s |
|---|---|---|---|---|
| M6 | 3 | 14 | 9 | 10 |
| M8 | 3.5 | 18 | 12 | 13 |
| M10 | 4 | 22 | 15 | 16 |
| M12 | 4 | 25 | 18 | 18 |
| M14 | 4 | 28 | 21 | 22 |
| M16 | 5 | 31 | 24 | 24 |
| M18 | 5 | 34 | 27 | 27 |
| M20 | 6 | 37 | 30 | 30 |
| M22 | 6 | 40 | 33 | 32 |
| M24 | 6 | 45 | 36 | 36 |
| M27 | 7 | 50 | 40 | 41 |
| M30 | 8 | 58 | 45 | 46 |
| M36 | 10 | 68 | 54 | 55 |
| M42 | 12 | 80 | 63 | 65 |
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