Description
Overview
DIN7985 defines a self tapping screw style designed to form or cut its own mating thread in suitable materials. Self tapping screws reduce the need for a separate nut and are useful in sheet metal, plastics and light assemblies.
This selected size is specified with diameter M4, length 8 mm, thread M4, pitch 0.7 mm.
Sold in multiples of '1000 pieces. 1 Box = '1000 pieces.
Material, Grade & Strength
Select the material and grade according to the required strength, corrosion exposure and service environment.
Finish & Corrosion Protection
Zinc plating provides economical sacrificial corrosion protection for indoor and general industrial service.
Typical Uses
Commonly used in sheet metal work, appliance repair, light fabrication, plastic housings, electrical enclosures and maintenance.
Technical Tips
- Use the correct pilot hole for the material thickness.
- Avoid over-tightening, which can strip the formed thread.
- Choose the correct drive bit to prevent cam-out and head damage.
Selection Advice
Confirm the standard, size, material, finish and drive style before ordering to ensure compatibility with the assembly.
Dimensions – DIN 7985 / ISO 7045 M4 x 8
| Standard | DIN 7985 / ISO 7045 |
|---|---|
| Product | Cross recess pan head machine screw |
| Thread | M4 x 0.7 |
| Length (l) | 8 mm |
| Head diameter (dk) | 8 mm |
| Head height (k) | 3.1 mm |
| Drive | Pozi/Phillips PH2 |
| Weight (calculated) | 1.59 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 7985 data sheet – all sizes
| Size | Thread | Head diameter (dk) | Head height (k) | Drive |
|---|---|---|---|---|
| M2 | M2 x 0.4 | 4 mm | 1.6 mm | Pozi/Phillips PH1 |
| M2.5 | M2.5 x 0.45 | 5 mm | 2 mm | Pozi/Phillips PH1 |
| M3 | M3 x 0.5 | 6 mm | 2.4 mm | Pozi/Phillips PH1 |
| M3.5 | M3.5 x 0.6 | 7 mm | 2.6 mm | Pozi/Phillips PH2 |
| M4 | M4 x 0.7 | 8 mm | 3.1 mm | Pozi/Phillips PH2 |
| M5 | M5 x 0.8 | 10 mm | 3.8 mm | Pozi/Phillips PH2 |
| M6 | M6 x 1 | 12 mm | 4.6 mm | Pozi/Phillips PH3 |
| M8 | M8 x 1.25 | 16 mm | 6 mm | Pozi/Phillips PH4 |
| M10 | M10 x 1.5 | 20 mm | 7.5 mm | Pozi/Phillips PH4 |
Nominal dimensions per DIN 7985 / ISO 7045. 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 | M4 |
| Thread Pitch | 0.7 mm |
| Thread Style | Fully Thread |
| Drive Type | Pozi |
| Head Style | Pan |
| Diameter | M4 |
| Length | 8 mm |
| Material | Mild Steel |
| Finish | Zinc Plated |
| Grade | Grade 4.8 |
| Standards Met | DIN 7985 |
| Package Quantity | 1000 |
| Package Type | Box |