My Account
Shopping Cart

Tie Down Eng 86257 Hex Head Bolt Kit 1/2" x 3-1/2" Grade 5 Zinc Plated Steel 4-Pack

Manufacturer

Tie Down Eng

<h3>About Tie Down Engineering</h3><p>Founded in 1969 and headquartered in Atlanta, Georgia, Tie Down Engineering has spent more than five decades earning its reputation as a global leader in custom manufacturing. What started as a focused effort to deliver better-engineered solutions for American industries has grown into a multi-division powerhouse serving markets that range from marine and mobile home to roofing, agriculture, renewable energy, and beyond. Every product Tie Down makes reflects an engineering-first philosophy — and, notably, they're all proudly made in the USA.</p><p>Tie Down operates six specialized manufacturing divisions, each dedicated to a specific market vertical. This structure lets the brand go deep rather than wide, developing purpose-built hardware that holds up under real-world conditions rather than generic components that merely check a box. Whether you're a boat owner, a contractor, or an OEM trailer manufacturer, there's a good chance Tie Down has already engineered the part you need.</p><h3>Trailer &amp; Marine Product Highlights</h3><p>Among the brand's most recognized product lines are its <a href="/6667-tie-down-eng-fender-1380">trailer fenders</a>, which are a staple for boat trailer owners and OEM builders alike. Tie Down offers fenders in galvanized steel, aluminum, and high-impact polyethylene, covering wheel sizes from 8 inches all the way up to 14–15 inches. Their innovative bracket-less plastic fender design mounts directly to the trailer frame without requiring separate fender brackets — a practical solution that simplifies installation and keeps the setup clean. UV-protected finishes on their plastic fenders resist fading, cracking, and degradation over time, making them a smart choice for trailers that see frequent saltwater exposure.</p><p>Equally important for safe trailering are Tie Down's <a href="/6667-tie-down-eng-safety-chains-cables-accessories-200888">safety chains, cables, and accessories</a>. These zinc-plated and galvanized products serve as the critical backup connection between a tow vehicle and its trailer, providing peace of mind in the unlikely event of coupler failure. Tie Down's safety chain lineup spans Class 2 through Class 4 ratings — from 3,500 lb. to well beyond 5,000 lb. carrying capacities — ensuring there's a properly rated option for light boat trailers and heavier-duty towing applications alike. Chains are sold in pairs and come with durable S-hooks for straightforward installation.</p><h3>Why Tie Down Engineering?</h3><ul style="list-style:disc"><li><strong>55+ years of manufacturing experience</strong> rooted in engineering excellence</li><li><strong>American-made products</strong> built with domestic craftsmanship</li><li><strong>Six specialized divisions</strong> serving marine, agricultural, roofing, and other industries</li><li><strong>Broad material selection</strong> — galvanized steel, aluminum, and high-impact polyethylene options</li><li><strong>OEM and aftermarket coverage</strong> for trailer builders and individual owners</li></ul><p>For anyone who trailers a boat, hauls equipment, or maintains a fleet of utility trailers, Tie Down Engineering's catalog represents a reliable, well-engineered choice backed by decades of field-proven performance.</p>

Part Number

86257
09/12/2036 8:30 AM
Sale Price

$14.07

In Stock (10+)

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

Crafted from high-quality zinc-plated Grade 5 steel, these hex head bolts deliver exceptional strength and corrosion resistance for reliable performance in marine and trailer applications. Ideal for mounting brackets, couplers, fenders, winch stands, and other trailer frame hardware, these fasteners are designed to withstand the rigors of towing and exposure to the elements.

Complete Hardware Kit:

  • Each package contains 4 bolts, washers, and nyloc nuts for convenient installation
  • Bolt size: 1/2 inch diameter x 3-1/2 inch length
  • Grade 5 zinc-plated steel construction
  • Corrosion-resistant finish for marine environments

Tie Down Engineering has been a trusted manufacturer of trailer and marine hardware for over 55 years, producing quality American-made products from their Atlanta, Georgia facility. These hex head bolts provide a durable and dependable fastening solution for both professional trailer builders and DIY enthusiasts.

Very easy and fast with lot of products to choose from!

It's really easy to use the site

Quickly found part and quick checkout.

Got my order a head of schedule. I will be getting everything i need for my truck through autoplicity.

Good price

Great have the parts

Thanks

Unless I misunderstood, the headlights I bought were suppose to be an easy swap but after removing my grill and old headlights I found that an adapter cable was nessassary. Hence I had to reassemble everything and order adapter cables that could not be bought locally.

Great price even after shipping cost added I have installed them in my truck bed behind the cab, Looks like it goes all the way across like a full across the bed box, but I can reach everything from the ground. Love it.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy