240-Piece Stainless Steel Metric Marine Fastener Kit – M4, M5 & M6
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Metric Fasteners, Marine-Ready
If your boat uses metric hardware — or you're working with imported electronics, European-spec fittings, or modern outboard components — this 240-piece stainless steel metric fastener kit keeps the right sizes within reach. Organized, protected, and built for the marine environment.
The kit covers M4, M5, and M6 pan head and flat head machine screws across multiple lengths, paired with matching locknuts and flat washers. Every piece is marine-grade stainless steel — corrosion-resistant in both saltwater and freshwater conditions, and strong enough for permanent installations.
Everything stores in a durable, compartmented, re-closable clear plastic case (4½" W × 9" L × 1¼" H) that keeps sizes sorted and protected between uses.
What's Included
- M4, M5, and M6 pan head and flat head machine screws (multiple lengths)
- Locknuts and flat washers to fit each screw size
- 240 pieces total in a compartmented, re-closable storage case
Key Features
- Marine-grade stainless steel — corrosion-resistant in saltwater and freshwater environments
- Covers the most common metric fastener sizes for marine hardware and electronics
- Includes locknuts and washers — no need to source hardware separately
- Organized storage case keeps sizes separated and easy to identify
- Suitable for fiberglass, aluminum, and metal substrates
Parts Desk Insights
Best use case: This kit is the go-to for boaters working with metric-spec hardware — common on imported outboards, European marine electronics, and modern helm components. It's particularly useful when mounting instruments, securing panels, or replacing fasteners on metric-threaded fittings where standard imperial sizes won't work. Keep one aboard as a permanent part of your tool kit, or stock it dockside for maintenance days. The included locknuts and washers make it a complete solution for most metric fastening tasks without needing to source additional hardware.
Part number: 50-59431 | Barcode: 719249594316
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.