Marine fasteners for securing fittings in saltwater environments with long-term corrosion resistance. Boat owners and maintenance teams gain confidence from Universal Hardware Socket Cap Bolts, made from A4 marine-grade stainless steel. Are these the right bolts for the jobs aboard your vessel?
⚡ At a Glance
- • Corrosion Resistance: A4 stainless steel resists corrosion and rust in marine conditions
- • Best for: Boats, yachts and exterior fittings regularly exposed to saltwater
- • Not ideal for: High-tensile structural applications requiring specified strength ratings
A4 stainless steel socket cap bolts with a hexagonal socket head, intended for marine use. Metric sizing and pack quantities suit routine maintenance and repair tasks.
Long-lasting corrosion resistance - with A4 marine-grade stainless steel
A4 stainless steel is specified for marine applications and is chosen for its resistance to corrosion and rust when exposed to moisture and saltwater. The material maintains integrity in harsh marine atmospheres.
Reduced replacement frequency for exterior fittings, helping to keep hardware secure and maintenance schedules predictable.
Secure fastening and neat finish - with Allen head hex socket design
Socket cap bolts have a cylindrical head with a central hexagonal socket designed for an Allen wrench or hex key, allowing controlled torque during installation. The low-profile head sits neatly against panels.
Panels and components remain tightly fastened with minimal snag risk, making these bolts suitable for visible or confined mounting points.
Choice of thread forms and sizes - with fully and partly threaded options
Descriptions list fully threaded variants up to M3 x 20mm, M4 x 25mm, M5 x 25mm, M6 x 30mm and M8 x 30mm, with larger sizes offered as partly threaded. Metric sizing supports common marine fittings.
Select a length and thread form appropriate for through-bolting or where an unthreaded shank is needed, improving assembly fit and strength.
✨ The 4 Key Reasons for Universal Hardware Socket Cap Bolts
- Pack of 10 - Ensures ready stock for regular maintenance and quick replacements
- M8 x 25mm size - Fits a wide range of marine brackets and common fittings
- Hex socket head - Allows precise torque with standard Allen keys, reducing slippage
- Cylindrical low-profile head - Minimises snagging on lines and exterior gear
📋 Technical Details at a Glance
- Category: Marine fasteners
- Material: A4 stainless steel (marine grade)
- Head type: Socket cap, cylindrical head
- Drive type: Hexagonal socket (Allen head)
- Size: M8 x 25mm (as listed in product name)
❓ Frequently Asked Questions
Q: Are these bolts suitable for marine use?
A: Yes. Made from A4 stainless steel, the bolts are described as marine grade and resistant to corrosion and rust in saltwater conditions.
Q: What tool is needed to install them?
A: A hex key or Allen wrench fits the central hexagonal socket for installation and removal.
Q: What sizes and threading options are available?
A: The listing includes metric sizes and notes fully threaded options up to certain sizes (for example M3 x 20mm, M4 x 25mm, M5 x 25mm, M6 x 30mm and M8 x 30mm) with larger sizes offered partly threaded.
🏆 Our Verdict
These socket cap bolts suit boat owners, marine fitters and anyone needing corrosion-resistant fasteners for saltwater exposure. Marine-grade A4 stainless steel combined with a hex socket head gives secure, low-profile fixings for exterior fittings. While cost may be higher than non-marine fasteners, longer service life and reduced replacement frequency improve long-term value.
