Stainless Steel Metric Machine Screw Kit, 240-Piece — M4, M5 & M6
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240-Piece Stainless Steel Metric Machine Screw Kit — Part 50-59431
A focused metric fastener assortment for boats and marine equipment built to metric standards. This 240-piece kit covers the most commonly needed M4, M5, and M6 pan head and flat head machine screws in stainless steel, paired with matching locknuts and flat washers for a complete fastening solution.
Stainless steel construction resists corrosion in salt and fresh water environments, making this kit a reliable bench staple for metric hardware work aboard European-built vessels, outboard engines, and imported marine electronics.
Parts Desk Insights
Best Use Case: Ideal for technicians and boat owners working on metric-spec equipment — including European outboards, imported electronics, instruments, and helm hardware — where standard SAE fasteners won’t fit. The slim, flat storage case is easy to stow in a toolbox or service bag. Pair with the 750-Piece SAE Kit (50-59433) or the 1,008-Piece SAE Kit (50-59436) for full imperial and metric coverage.
What’s Included
- M4, M5, and M6 pan head machine screws — various lengths
- M4, M5, and M6 flat head machine screws — various lengths
- Locknuts and flat washers to match included screws
- 240 pieces total
- Durable, compartmented, re-closable clear plastic storage case (4½" W × 9" L × 1¼" H)
Specifications
- Material: Stainless steel
- Thread Standard: Metric (M4, M5, M6)
- Part Number: 50-59431
- Piece Count: 240
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Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 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.