-
Stainless Steel Socket Head Countersunk Screws
DIN 7991 stainless socket head countersunk screws are metric fasteners with a flat, countersunk head and internal hexagon drive.
Designed to sit flush within a countersunk hole, providing a smooth, snag free surface.
Applicable Standard
DIN 7991 – Hexagon socket countersunk head screws (equivalent to ISO 10642).
Material
- A2 Stainless Steel (304)
- A4 Stainless Steel (316)
Sizes
M5–M24.
Specific Features
- Metric coarse thread as standard
- Generally supplied fully threaded (some sizes or stock variants may include a partially threaded shank)
- Internal hexagon socket
- Countersunk head for flush installation
Performance
- Mechanical and engineering fixings
- Architectural and fabrication applications
- Machinery, equipment, and general construction use
- Installations requiring a smooth, low profile finish
- Suitable for external, corrosive, and marine environments
Typical Applications
- Architectural panels and cladding
- Floor plates, decking and walkways Fabrication and machinery assemblies
- Covers and enclosures
- Metal fabrication and panels
Installation Notes
- Installed using a hex key (Allen key)
- Correct countersunk hole angle required for proper seating
- Anti-galling measures recommended when assembling stainless steel components
Dimensions & Design
Countersunk head for flush installation.
| Product | Size d1 (mm) | d2 (mm) | t (mm) | s (mm) | L (mm) | |
|---|---|---|---|---|---|---|
| M5 | 5 | 10.0 | 2.3 | 3.0 | >6 | |
| M6 | 6 | 12.0 | 2.5 | 4.0 | >8 | |
| M8 | 8 | 16.0 | 3.5 | 5.0 | >10 | |
| M10 | 10 | 20.0 | 4.4 | 6.0 | >12 | |
| M12 | 12 | 24.0 | 4.6 | 8.0 | >16 | |
| M16 | 16 | 30.0 | 5.3 | 10.0 | >20 | |
| M20 | 20 | 36.0 | 5.9 | 12.0 | >30 | |
| M24 | 24 | 39.0 | 10.3 | 14.0 | >30 |