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

Manufacturer

Seachoice

<h3>About Seachoice: Built by Boaters, for Boaters</h3><p><strong>Seachoice</strong> has been a cornerstone of the marine industry since 1988, when it launched as a supplier of high-quality marine hardware and OEM replacement parts, focusing on essentials like cleats, hinges, and hasps. Over the decades, the brand recognized that boaters needed a single trusted source for everything on the water, and rose to the challenge — today offering more than 6,000 replacement parts and accessories across 17 key product categories to serve the fishing, boating, and watersports communities worldwide.</p><h3>A Comprehensive Marine Catalog</h3><p>Few brands match the breadth of Seachoice's lineup. Whether you're rigging a new vessel, maintaining a well-worn workhorse, or gearing up for a weekend on the lake, Seachoice covers the essentials. The catalog spans marine lighting, fuses, fasteners, safety equipment, anchors, electrical components, boat plumbing, watersports accessories, and much more. Standout product lines include SAE- and DOT-approved marine lighting solutions, <strong>zinc anodes</strong> for corrosion protection, galvanized folding grapnel anchors, bilge pumps, tow ropes, and antifouling bottom paints — making Seachoice a go-to source for both routine maintenance and performance upgrades.</p><p>The brand's electrical category is especially expansive, covering connectors, terminals, crimpers, and heat-shrink tubing for clean, reliable wiring aboard any vessel. Seachoice also offers solar panels compatible with boats, RVs, and other vehicles — a testament to the brand's commitment to modern, energy-smart solutions on the water.</p><h3>Quality and Reliability You Can Count On</h3><p>Seachoice's guiding philosophy is straightforward: premium quality at a competitive price. The brand is described as &quot;run for and by boaters,&quot; meaning every design decision is grounded in real on-water experience. Backing up that confidence is a no-hassle warranty that covers the entire product line, giving customers peace of mind on every purchase. Products are continuously refined — with dozens of parts redesigned in recent years to meet higher performance standards — while pricing stays accessible for casual weekend boaters and serious mariners alike.</p><p>With inventory stocked across 18 strategic locations throughout the United States, Canada, and globally, Seachoice ensures that dealers and boaters can get what they need when they need it — before the tides change.</p><h3>Who Is Seachoice For?</h3><p>Seachoice's appeal spans a wide range of on-water enthusiasts. Anglers will find fishing-specific accessories and safety gear suited to long days offshore. Recreational boaters can outfit their vessels with docking hardware, fenders, mooring lines, and lighting. Watersports fans can gear up with tow ropes, ski ropes, and inflatable-compatible air pumps. Even sailing and paddlesports communities find representation in Seachoice's extensive catalog. Simply put, if it belongs on a boat, Seachoice likely makes it.</p>

Part Number

00616
09/12/2036 6:58 AM
Sale Price

$80.79

In Stock (10+)

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Usually delivered within 2 days

free shipping

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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