Tie Down Eng U-Bolts
Tie Down Engineering 86207 Square U-Bolt Kit 1/2"-13 x 4-1/8" x 3" Zinc Plated Trailer Hardware
Tie Down Engineering 86205 Zinc Plated Square U-Bolt Kit 1/2"-13 x 3-1/8" x 3" - Pair
Tie Down Engineering 86204 Zinc Plated Square U-Bolt Kit 1/2"-13 x 2-1/8" x 4" (Pair)
Tie Down Engineering 86223 Galvanized Square U-Bolt Kit 1/2"-13 x 2-1/16" x 4-13/16"
Tie Down Eng 86222 Galvanized Square U-Bolt Kit 1/2" x 3-1/16" x 3-3/16" Trailer Hardware
Tie Down Engineering 86215 Square U-Bolt Kit 1/2-13 x 2-1/16 x 4-13/16 Zinc Plated Trailer Hardware
Tie Down Engineering 86214 Square Zinc-Plated Trailer U-Bolt Kit 1/2" x 3-1/16" x 3-13/16"
Tie Down Engineering 86211 Square U-Bolt Kit 3/8"-16 x 4-1/8" x 3" Zinc Plated Pair
Tie Down Engineering 86210 Zinc-Plated Square U-Bolt Kit 3/8in-16 x 3-1/8in x 4in (2-Pack)
Tie Down Engineering 86209 Zinc Plated Square U-Bolt Kit 3/8in-16 x 3-1/8in x 3in Pair
Tie Down Engineering 86208 Zinc-Plated Square U-Bolt Kit 3/8 in. x 2-1/8 in. x 4 in.
Tie Down Engineering 86231 Square U-Bolt Kit 7/16"-14 x 3-1/16" x 4-5/16" Zinc Plated
Tie Down Engineering 86230 Square Zinc-Plated Marine U-Bolt Kit 7/16-14 x 3-1/16 x 3-5/16
Tie Down Eng 86229 Square U-Bolt 7/16" x 2-1/16" x 4-5/16" Zinc Plated with Hardware
Tie Down Engineering 86226 Galvanized Round U-Bolt Kit 1/2 in. x 3-1/16 in. x 6-11/16 in.
Tie Down Eng 86225 U-Bolt Round 1/2 x 2-3/8 x 5-3/8 Galvanized Trailer Hardware Kit
Tie Down Eng 86224 Round U-Bolt Kit 3/8"-16 x 1-3/4" x 4-3/16" Hot Dipped Galvanized
Tie Down Engineering 86234 Zinc Plated Square U-Bolt Kit 7/16" x 4-1/16" x 2-13/16"
Representative Photo, actual item may vary
Tie Down Engineering U-Bolts for Marine Trailer Applications
When it comes to securing critical trailer components in harsh marine environments, Tie Down Engineering's U-Bolts deliver exceptional corrosion resistance through both zinc-plated and hot-dip galvanized coating options. These U-bolts are designed for mounting brackets, spring hangers, winch posts, and crossmembers to trailer frames, making them essential hardware for boat trailer maintenance and assembly. For over five decades, Tie Down Engineering has specialized in marine and trailer components, bringing Atlanta-based manufacturing expertise to the U-Bolts category.
Tie Down's zinc-plated U-bolts come complete with flat washers and nyloc nuts, providing a secure fit while preventing rusting. For boaters and trailer owners who demand even greater protection against the elements, the hot-dip galvanized coating offers added protection against rust buildup, with kits that include flat washers, lock washers, and nuts for easy installation. This comprehensive approach to corrosion resistance is critical for equipment regularly exposed to saltwater spray, boat ramp submersion, and coastal humidity.
Engineered Sizing and Configuration Options
Tie Down Engineering offers various rod widths of 7/16 inch, 3/8 inch, and 1/2 inch, paired with 14, 16, and 13 threads per inch respectively, ensuring proper fitment across different trailer frame dimensions and load requirements. Customers can select between square or round shape options for seamless integration into their trailer setup, accommodating both standard rectangular tubing and round pipe frame construction common in marine trailer designs.
The company's U-bolt kits are available as individual units or in pairs, providing flexibility whether you're replacing a single failed component or outfitting an entire trailer build. Each kit arrives with all necessary hardware, eliminating the need to source compatible washers and fasteners separately. This attention to complete kit packaging reflects Tie Down Engineering's understanding of the practical needs of DIY trailer owners and professional boat yard technicians alike.
Marine-Grade Manufacturing Standards
As an ISO 9001:2015 certified manufacturer operating from their Atlanta, Georgia facility, Tie Down Engineering applies rigorous quality control processes to every U-bolt they produce. The company's marine product line benefits from decades of engineering experience in environments where hardware failure isn't just inconvenient—it's potentially dangerous. Whether you're securing leaf spring assemblies, mounting roller brackets, or fastening crossmembers, these U-bolts provide the reliability that marine trailering demands season after season.