Description
Overview
Screws are selected by head style, drive type, thread form, length, material and finish to suit the mating component and installation method.
This selected size is specified with diameter M8, length 80 mm, thread M8, pitch 1.25 mm.
Sold in multiples of '25 pieces. 1 Box = '25 pieces.
Material, Grade & Strength
A4 / 316 stainless steel provides enhanced corrosion resistance for coastal, marine, chemical and harsh outdoor environments.
Finish & Corrosion Protection
Stainless products rely on the corrosion resistance of the stainless material rather than a separate plated coating.
Typical Uses
Used in machinery, fabrication, construction, mining, agriculture, maintenance and general engineering where the selected size, material and finish match the application.
Technical Tips
- Confirm thread size, length, material and finish before ordering.
- Use compatible mating parts of suitable strength.
- For critical joints, follow recognised torque guidance.
- Choose corrosion-resistant material or finish for exposed environments.
Selection Advice
Select the product by matching the thread, size, material, finish and function to the assembly. Avoid choosing only by appearance or a partial part number.
Dimensions – DIN 571 M8 x 80
| Standard | DIN 571 |
|---|---|
| Product | Hexagon head coach (lag) screw |
| Diameter | 8 mm |
| Length (l) | 80 mm |
| Across flats (s) | 13 mm |
| Head height (k) | 5.5 mm |
| Thread | wood screw thread, ~0.6 l |
| Weight (calculated) | 29.77 kg per 1 000 pieces |
Material, Grade & Strength
| Material | Stainless steel A4 (316) |
|---|---|
| Steel grade | AISI 316 (1.4401) |
| Composition | C max 0.07%, Cr 16.5-18.5%, Ni 10.0-13.0%, Mo 2.0-2.5% |
| Property class | A4-70 (ISO 3506) unless marked -80 |
| Tensile strength Rm (min) | 700 MPa (class 70), 800 MPa (class 80) |
| Yield Rp0.2 (min) | 450 MPa (class 70), 600 MPa (class 80) |
| Typical use | marine, coastal, chlorides, chemical plant |
Finish & Corrosion Protection
Plain / self colour: No applied coating. Stainless, brass and nylon parts are supplied plain; plain steel parts need oil, paint or protected environments.
DIN 571 data sheet – all sizes
| Size | Diameter | Across flats (s) | Head height (k) | Thread |
|---|---|---|---|---|
| M6 | 6 mm | 10 mm | 4 mm | wood screw thread, ~0.6 l |
| M8 | 8 mm | 13 mm | 5.5 mm | wood screw thread, ~0.6 l |
| M10 | 10 mm | 17 mm | 7 mm | wood screw thread, ~0.6 l |
| M12 | 12 mm | 19 mm | 8 mm | wood screw thread, ~0.6 l |
| M16 | 16 mm | 24 mm | 10 mm | wood screw thread, ~0.6 l |
| M20 | 20 mm | 30 mm | 13 mm | wood screw thread, ~0.6 l |
Nominal dimensions per DIN 571. Weights are calculated from nominal dimensions and are a guide only (±10%). Values for fit and strength should be confirmed against the standard for critical applications.
Specifications
| Measurement Type | Metric |
|---|---|
| Thread Size | M8 |
| Thread Pitch | 1.25 mm |
| Thread Style | Partial Thread |
| Head Style | Hex |
| Diameter | M8 |
| Length | 80 mm |
| Material | Stainless Steel |
| Finish | Stainless steel |
| Grade | Grade (A4) |
| Standards Met | DIN 571 |
| Package Quantity | 25 |
| Package Type | Box |