Stainless Steel Button Head Socket Cap Screws
What are button head socket cap screws? Button head socket cap screws are stainless machine screws with a low domed head and an internal hex drive for a finished look where clearance is limited. Made from stainless, they resist rust in wet and outdoor use while giving a smooth, rounded head that is easy on hands and appearance.
When a button head is the right call
The button head sits low with a smooth, rounded dome, giving a more finished and hand-friendly look than a standard socket head while still driving with an Allen key. It has a shallower socket and less strength than a standard head, so it is best where appearance and low profile matter more than maximum torque, such as covers, guards, and visible assemblies. In stainless, it adds corrosion resistance for outdoor and marine fixtures, with 316 for coastal exposure.
Why choose button head socket cap screws
- Finished look: smooth low dome for visible hardware.
- Low profile: sits close to the surface in tight clearance.
- Internal hex drive: clean Allen-key installation.
- Corrosion resistance: holds up in wet and outdoor use.
Common applications for button head socket cap screws
- Covers, guards, and panels
- Visible and hand-contact hardware
- Low-clearance assemblies
- Marine and outdoor fixtures (use 316)
For a flush finish, see stainless flat head socket cap screws, and browse every head on the main socket head cap screws category.
Button Head Socket Cap Screws FAQ
Are button head socket screws as strong as standard?
No. The low dome has a shallower socket and less strength. Choose them for appearance and low profile rather than maximum torque.
What drive do button head socket screws use?
An internal hex (Allen) drive, the same as other socket cap screws, engaged with a matching hex key or bit.
Should I use 18-8 or 316?
18-8 suits most use. For coastal and marine fixtures, choose 316 for the best corrosion resistance.