Product Description
M8 Grade 8.8 Yellow Zinc Plated Steel Hexagon Head Bolts With Shank – DIN 931
M8 hexagon head bolts manufactured to DIN 931 from Grade 8.8 high tensile steel, with a zinc plated and yellow passivated finish. These part-threaded bolts feature a plain shank beneath the head and an M8 × 1.25 metric coarse thread.
The hexagon head accepts a 13mm spanner or socket. Available in lengths from 45mm to 100mm for machinery, maintenance and general engineering assemblies requiring a bolt with an unthreaded shank.
Specifications
| Product type | Hexagon head bolt with shank |
|---|---|
| Standard | DIN 931 |
| Thread size | M8 |
| Nominal thread diameter | 8mm |
| Thread pitch | 1.25mm |
| Thread type | Metric coarse — standard pitch |
| Thread coverage | Part threaded, with a plain shank beneath the head |
| Material | High tensile steel |
| Property class | 8.8 |
| Finish | Zinc plated with yellow passivation |
| Head style | Hexagon |
| Spanner size | 13mm across flats |
| Nominal head height | 5.3mm |
| Nominal threaded length | 22mm for the listed bolt lengths |
| Length measurement | Measured from beneath the head to the end of the bolt |
Available Lengths
45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 80mm, 90mm and 100mm.
Dimensions are subject to manufacturing tolerances. Please check with us before ordering if an exact plain shank or threaded length is critical to your assembly.
Pack Quantities
Available in quantities of 1, 5, 10, 20, 50, 100, 250, 500 and 1000 bolts. Select the required length and quantity from the options above.
Typical Applications
- Machinery and equipment assembly.
- Securing brackets and mechanical components.
- Maintenance and replacement of matching M8 bolts.
- Joints requiring an unthreaded shank through the clamped components.
Fitting Information
Use with matching M8 × 1.25 nuts or tapped holes. Select compatible nuts and washers of a suitable strength for the assembly.
Check that the bolt provides sufficient thread engagement and that the plain shank does not prevent the joint from tightening fully. Use a 13mm spanner or socket and follow the tightening requirements for the application.
