Marine Well Nuts, 1/4-20 x 5/8" — 2-Pack | Part 50-59886
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Well Nuts, 1/4-20 x 5/8” — 2-Pack | Part 50-59886
Well nuts are a two-part blind fastener combining a rubber body with a brass threaded insert. When a bolt is tightened, the rubber barrel compresses and expands behind the mounting surface, locking the fastener in place without requiring access to the back side of the panel. The rubber body simultaneously seals the hole against water intrusion.
This shorter 5/8" length is suited for thinner panels and surfaces where the 1" version would bottom out or over-compress.
Parts Desk Insights
Best Use Case: Best suited for mounting instruments, navigation lights, electronics, and trim panels to thin fiberglass, acrylic, or composite surfaces — particularly where panel thickness is 1/4" or less. Commonly used for windshield mounting, cockpit instrument bezels, and interior panel trim. Confirm panel thickness before selecting between this 5/8" length and the longer 1" Well Nut (50-59887). The 1/4-20 thread is one of the most common in marine hardware.
Specifications
- Material: Rubber body with brass threaded insert
- Thread Size: 1/4-20
- Length: 5/8"
- Quantity: 2 per pack
- Part Number: 50-59886
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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
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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.
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Item must be in new, unused condition
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Important:
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