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 M12, length 75 mm, thread M12, pitch 1.75 mm.
Sold in multiples of '50 pieces. 1 Box = '50 pieces.
Material, Grade & Strength
Mild steel is an economical carbon steel option for general purpose fastening where high tensile strength is not required.
Finish & Corrosion Protection
Zinc plating provides economical sacrificial corrosion protection for indoor and general industrial service.
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 M12 x 75
| Standard | DIN 571 |
|---|---|
| Product | Hexagon head coach (lag) screw |
| Diameter | 12 mm |
| Length (l) | 75 mm |
| Across flats (s) | 19 mm |
| Head height (k) | 8 mm |
| Thread | wood screw thread, ~0.6 l |
| Weight (calculated) | 67.76 kg per 1 000 pieces |
Material, Grade & Strength
| Material | Mild steel (grade 4.6/4.8) |
|---|---|
| Property class | 4.6 / 4.8 (mild steel) |
| Tensile strength Rm (min) | 400 / 420 MPa |
| Yield strength (min) | 240 / 340 MPa |
| Proof load stress | 225 / 310 MPa |
| Matching nut | property class 5 (ISO 898-2) |
Finish & Corrosion Protection
Zinc plated (clear/blue passivated): Electroplated zinc, typically 5-8 um (ISO 4042). Economical protection for dry indoor and light outdoor use; white rust in neutral salt spray typically from ~24-72 h depending on passivate.
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 | M12 |
| Thread Pitch | 1.75 mm |
| Thread Style | Partial Thread |
| Drive Type | External Hex |
| Head Style | Hex |
| Diameter | M12 |
| Length | 75 mm |
| Material | Mild Steel |
| Finish | Zinc Plated |
| Grade | Grade 4.8 |
| Standards Met | DIN 571 |
| Package Quantity | 50 |
| Package Type | Box |