Description
Overview
DIN 963 defines a slotted countersunk machine screw with a flat head designed to sit flush in a countersunk hole. The standard controls the head angle, slot form, thread and dimensional proportions so the screw can be used consistently in light mechanical and panel assemblies.
This selected size is specified with diameter M6, length 80 mm, thread M6, pitch 1.25 mm.
Sold in multiples of '100 pieces. 1 Box = '100 pieces.
Material, Grade & Strength
The material and grade should be selected according to clamp load, corrosion exposure, vibration, temperature and compatibility with mating components.
Finish & Corrosion Protection
Plain finish fasteners have no protective plated coating and are best used indoors, in oiled assemblies, in painted structures or where corrosion exposure is controlled.
Typical Uses
DIN 963 countersunk slotted machine screws are used in panels, covers, electrical assemblies, light engineering, fixtures and applications where a flush surface is required with a simple flat screwdriver drive.
Technical Tips
- Use a correctly formed countersink so the head seats evenly and does not stand proud.
- Avoid over-tightening slotted screws as the drive can cam out or damage the slot.
- Use with a tapped hole or matching nut of the same thread size.
- Choose stainless steel where corrosion resistance is required.
Frequently Asked Questions
When should a countersunk screw be used? Use countersunk screws where the head must sit flush with the surface or where a protruding head would interfere with movement or appearance.
Dimensions – DIN 963 / ISO 2009 M8 x 80
| Standard | DIN 963 / ISO 2009 |
|---|---|
| Product | Slotted countersunk machine screw |
| Thread | M8 x 1.25 |
| Length (l) | 80 mm (overall) |
| Head diameter (dk) | 14.5 mm |
| Head height (k) | 4 mm |
| Drive | Slotted |
| Weight (calculated) | 27.23 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
Plain / self colour: No applied coating. Stainless, brass and nylon parts are supplied plain; plain steel parts need oil, paint or protected environments.
DIN 963 data sheet – all sizes
| Size | Thread | Head diameter (dk) | Head height (k) | Drive |
|---|---|---|---|---|
| M2 | M2 x 0.4 | 3.8 mm | 1.2 mm | Slotted |
| M2.5 | M2.5 x 0.45 | 4.7 mm | 1.5 mm | Slotted |
| M3 | M3 x 0.5 | 5.6 mm | 1.65 mm | Slotted |
| M3.5 | M3.5 x 0.6 | 6.5 mm | 1.93 mm | Slotted |
| M4 | M4 x 0.7 | 7.5 mm | 2.2 mm | Slotted |
| M5 | M5 x 0.8 | 9.2 mm | 2.5 mm | Slotted |
| M6 | M6 x 1 | 11 mm | 3 mm | Slotted |
| M8 | M8 x 1.25 | 14.5 mm | 4 mm | Slotted |
| M10 | M10 x 1.5 | 18 mm | 5 mm | Slotted |
Nominal dimensions per DIN 963 / ISO 2009. 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 | M6 |
| Thread Pitch | 1.25 mm |
| Thread Style | Fully Thread |
| Drive Type | Slotted |
| Head Style | Countersunk |
| Diameter | M6 |
| Length | 80 mm |
| Material | Mild Steel |
| Finish | Plain |
| Grade | Grade 4.8 |
| Standards Met | DIN 963 |
| Package Quantity | 100 |
| Package Type | Box |