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Seachoice 00616 #4-40 Nylon Insert Lock Nut 18-8 Stainless Steel 100-Pack

Manufacturer

Seachoice

<h3>Trusted Marine Hardware Since 1988</h3><p>Seachoice was established in 1988 as a supplier of high-quality marine hardware and OEM replacement parts, originally focusing on cleats, hinges, and hasps. Recognizing the demand for a full range of quality products at an affordable price, Seachoice aggressively expanded its product line and today offers more than 6,000 replacement parts and accessories in 17 key categories—including lighting, fuses, fasteners, safety equipment, and anchors—to satisfy fishing, boating, and watersports enthusiasts worldwide.</p><p>Run for and by boaters, Seachoice offers a no-hassle warranty on everything they produce, demonstrating their commitment to customer satisfaction and product reliability. With products stocked in 18 strategic locations serving the U.S., Canada, and customers around the globe, Seachoice has built a reputation as an industry-trusted brand that consistently delivers value without sacrificing quality.</p><h3>Comprehensive Anchoring Solutions</h3><p>Whether you're securing a personal watercraft, fishing boat, or larger vessel, Seachoice offers a complete range of anchoring solutions. Their <a href="/7548-seachoice-mooring-anchors-200693">mooring anchors</a> provide reliable holding power for various bottom conditions, while their <a href="/7548-seachoice-slip-ring-traditional-anchors-200970">slip ring and traditional anchors</a> deliver versatile performance for different marine environments. For boaters seeking general-purpose anchoring systems, Seachoice's <a href="/7548-seachoice-anchors-200101">anchors</a> feature hot-dipped galvanized construction and reinforced flukes engineered to penetrate deeply and hold firmly.</p><h3>Marine Rope and Line Products</h3><p>Proper cordage is essential for safe boating operations, and Seachoice's extensive selection of <a href="/7548-seachoice-rope-17207">rope</a> meets the demanding requirements of marine environments. From traditional 3-strand nylon rope that serves as an excellent economical choice for anchor rodes to G4 high-test galvanized chain hand-spliced in the USA, Seachoice rope products are designed to operate smoothly with windlass systems and withstand the rigors of saltwater exposure.</p><h3>Comfort and Convenience on Deck</h3><p>Seachoice extends beyond essential hardware to include comfort-focused products like their popular <a href="/7548-seachoice-deck-chairs-200305">deck chairs</a>. The manufacturer offers folding deck chairs that combine style with functionality, providing comfortable seating that folds flat for easy storage when not in use.</p><h3>Quality You Can Trust</h3><p>Seachoice is known for raising the bar when it comes to quality and reliability, with over 50 parts completely redesigned to meet evolving boater needs. Whether you're equipping a new vessel or replacing worn components, Seachoice delivers marine-grade products that perform season after season, backed by their comprehensive warranty and decades of industry expertise.</p>

Part Number

00616
08/19/2036 2:34 PM
Sale Price

$80.79

In Stock (10+)

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Usually delivered within 2 days

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FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Seachoice 00616 is a #4-40 Nylon Insert Lock Nut crafted from 18-8 stainless steel for reliable corrosion resistance in marine and outdoor environments. Each nut features an integrated nylon collar that grips the mating bolt threads, creating a secure frictional lock that resists loosening from vibration, shock, and dynamic loads — no secondary locking hardware required. Sold in a convenient 100-piece bulk bag, these locknuts are ideal for production assembly, repair work, or stocking a marine hardware inventory.

Key Features:

  • Thread Size: #4-40 (UNC — Unified National Coarse)
  • Material: 18-8 Stainless Steel for excellent corrosion and rust resistance
  • Locking Mechanism: Nylon insert collar that locks against bolt threads without damaging them
  • Reusable: Nylon insert maintains clamping force through multiple installations
  • Quantity: 100 pieces per bag — ideal for bulk use and resupply
  • Finish: Natural stainless, no plating required

These nylon insert lock nuts — also known as nyloc nuts or prevailing torque nuts — are a go-to fastening solution for marine hardware, electrical panels, instrument mounting, and any application where vibration resistance is critical. The 18-8 stainless steel construction makes them especially well-suited for saltwater and high-humidity environments.

Very pleased with my order! Would buy from them again! Thank you!

Was okay

Great experience. Fast shipping. Item arrived in good shape.

We got the tire in time!

Very helpful and easy

I can&amp;#039;t really grade the last one as the product has not arrived yet.

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