Product Description
M8 A4 316 Stainless Steel Socket Button Head Screws
M8 socket button head machine screws manufactured from A4 316 marine grade stainless steel. Featuring an M8 x 1.25mm metric coarse thread and a 5mm internal hexagon drive, these screws provide a neat fastening for panels, covers, brackets and mechanical assemblies.
The shallow, rounded button head sits above the fixing surface, giving visible fastenings a smooth appearance. A4 stainless steel offers improved corrosion resistance compared with A2 stainless steel, making it a useful choice for outdoor equipment and assemblies exposed to coastal conditions.
Specifications
| Product type | Socket button head machine screw |
|---|---|
| Head pattern | ISO 7380-1 |
| Material | A4 316 marine grade stainless steel |
| Thread diameter | M8 – 8mm nominal |
| Thread pitch | 1.25mm – metric coarse |
| Thread direction | Right-hand |
| Head style | Rounded button head |
| Drive type | Internal hexagon socket |
| Allen key size | 5mm |
| Length measurement | From underneath the head to the screw tip |
Available Lengths
10mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 55mm, 65mm, 70mm, 75mm and 80mm.
Key Features
- A4 316 stainless steel for corrosion-resistant fastening.
- Low-profile, rounded button head for a neat appearance.
- 5mm Allen key drive.
- Standard M8 x 1.25mm metric coarse thread.
- Twelve available lengths for assembly, repair and maintenance work.
Selection and Installation
Use with matching M8 x 1.25mm nuts or tapped holes. Select a length that provides adequate thread engagement without bottoming out in a blind hole. Screw length is measured from beneath the head and excludes the button head.
Fully engage the 5mm hex key before tightening. Use a tightening torque appropriate to the fastener and joint. Button head screws have reduced loadability compared with equivalent socket cap screws, so check suitability where high clamping loads are required.
Pack Sizes
Available in packs of 1, 5, 10, 20, 50, 100, 250, 500 and 1000. Select the required length and pack quantity from the options.
Standards
- ISO 7380-1 – hexagon socket button head screws.
