Product Description
M4 Grade 10.9 Zinc Plated Socket Button Head Screws – ISO 7380
M4 Grade 10.9 high tensile steel socket button head screws with a zinc plated finish. The rounded button head provides a compact profile, with an internal hexagon socket accepting a 2.5mm Allen key.
Featuring an M4 × 0.7mm metric coarse thread, these screws are available in seven lengths from 6mm to 25mm for compatible machinery, equipment assembly, repairs and maintenance.
Specifications
| Thread size | M4 |
|---|---|
| Thread pitch | 0.7mm – metric coarse |
| Thread direction | Right-hand |
| Material | High tensile steel |
| Property class | 10.9 |
| Finish | Zinc plated |
| Head style | Rounded socket button head |
| Dimensional standard | ISO 7380-1 – button head without flange |
| Head diameter | 7.24–7.60mm |
| Head height | 1.95–2.20mm |
| Drive size | 2.5mm hexagon socket / Allen key |
| Minimum socket engagement depth | 1.30mm |
| Available lengths | 6mm, 8mm, 10mm, 12mm, 16mm, 20mm and 25mm |
| Length measurement | From beneath the head to the end of the screw |
Available Lengths
- M4 × 6mm
- M4 × 8mm
- M4 × 10mm
- M4 × 12mm
- M4 × 16mm
- M4 × 20mm
- M4 × 25mm
Key Features
- Grade 10.9 high tensile steel construction.
- Zinc plated finish provides corrosion protection.
- Rounded button head for a compact fastening profile.
- M4 × 0.7mm metric coarse thread.
- Internal hexagon drive accepts a 2.5mm Allen key.
Selection and Installation
Choose the length required for the joint, measured from beneath the head. Use with compatible M4 × 0.7mm tapped holes or matching nuts.
Button head screws have reduced load-bearing capacity because of their head geometry. Select a tightening torque appropriate to the screw design and joint, and seat the 2.5mm Allen key fully before tightening.
Pack Sizes
Available in quantities of 5, 10, 20, 50, 100, 250, 500 or 1000 screws. Select the required length and pack size before ordering.
Standards
- ISO 7380-1 – hexagon socket button head screw dimensions.
- ISO 898-1 – mechanical property class reference, subject to the reduced loadability of the button head design.
- ISO 261 – metric screw thread diameter and pitch series.
