Product Description
M12 Grade 8.8 Zinc Plated Serrated Flange Set Screws – DIN 6921
M12 Grade 8.8 high tensile steel hexagon flange set screws with a zinc plated finish. These fully threaded fixings feature an integral flange with serrations beneath the head.
The flange spreads the clamping load over a wider bearing area, while the serrations grip the mating surface to help resist loosening. Available in 30mm and 35mm lengths with standard M12 × 1.75mm metric coarse threads.
Specifications
| Product type | Hexagon flange set screw / fully threaded flange bolt |
|---|---|
| Nominal thread diameter | M12 — 12mm |
| Thread pitch | 1.75mm |
| Thread type | Metric coarse, right-hand |
| Thread coverage | Fully threaded |
| Material | High tensile steel |
| Property class | 8.8 |
| Finish | Zinc plated |
| Head style | External hexagon with integral flange |
| Flange underside | Serrated |
| Spanner size | 16mm across flats |
| Guide flange diameter | 26.6mm |
| Guide head height | 11.5mm |
| Dimensional pattern | DIN 6921 |
Available Lengths
| Size | Length Beneath Flange | Thread Pitch |
|---|---|---|
| M12 × 30mm | 30mm | 1.75mm |
| M12 × 35mm | 35mm | 1.75mm |
Length is measured from beneath the flange to the tip. Dimensions are provided as a guide.
Key Features
- Grade 8.8 high tensile steel construction.
- Serrated flange underside helps resist loosening.
- Integral flange provides a broad bearing surface.
- Fully threaded body for matching nuts or tapped holes.
- Zinc plated finish provides corrosion protection.
- 16mm external hexagon drive.
Typical Applications
Machinery, brackets, frames and general engineering assemblies requiring an M12 fully threaded fixing with a serrated flange head.
Installation
Match the M12 × 1.75mm thread to the mating component and select a length that provides suitable thread engagement. Tighten with a correctly fitting 16mm spanner or socket to the torque specified for the assembly.
The serrations contact the mating surface directly and may mark painted, plated or softer surfaces. Check that this bearing arrangement suits the joint.
Ordering
Select 30mm or 35mm length. Pack quantities available: 1, 5, 10, 20, 50, 100, 250, 500 or 1000 screws.
Standards
- DIN 6921 — hexagon flange head dimensional pattern, with serrated underside.
- ISO 898-1 — mechanical property classification for Class 8.8 steel fasteners.
