Buyers Products UB623520 20in Square Bend U-Bolt Kit - Strong Grade 5

In this review the Buyers Products UB623520 20in Square Bend U-Bolt Kit is evaluated for mechanics and fleet owners who need a dependable way to mount truck boxes or connect bodies to varied chassis. The bottom line: this kit stands out for its straightforward, no-frills installation and durable components, primarily the forged 1/2 in tie bars that give the assembly solid long-term strength. It is a practical, value-oriented solution when a reliable, Grade 5 equivalent hardware set is required for demanding truck mounting tasks.

Key Features

• Complete kit: Includes four 5/8 in square bend U-bolts, eight hex nuts and split lock washers so the hardware needed for a full mount is in one package.
• Forged tie bars: The 1/2 in thick forged steel tie bars provide superior strength and resist bending under load compared with thinner plate alternatives.
• Grade 5 equivalent hardware: High-tensile hardware delivers reliable clamping force for truck boxes and body-to-chassis connections in heavy-duty use.
• Versatile lengths: Available in various lengths to accommodate different truck chassis and frame sizes for flexible fitment.
• Easy installation: Standard 5/8 in U-bolt diameter and common hex nuts make assembly straightforward with basic tools.

Who It's For

The kit is well suited for truck owners, upfitters, and fleet maintenance shops that need a robust, ready-made hardware set to mount truck boxes, headache racks, or secure body mounts to common chassis frames. Professionals who value durability and a straightforward installation will appreciate the forged steel tie bars and Grade 5 equivalent components.

It is less appropriate for custom or vintage trucks that require nonstandard fasteners or for projects where stainless corrosion resistance is mandatory; those users should look for stainless U-bolts or specialty hardware instead.

Pros & Cons

Pros

• Well-made hardware with strong forged tie bars that improve long-term durability.
• Comprehensive kit composition reduces the need to source extra parts for a complete mount.
• Good value for the price, with customers reporting solid fit and function on common frames.

Cons

• Not stainless steel, so additional corrosion protection may be needed in harsh environments.
• One reported instance of missing nuts suggests checking contents before installation.

Specifications

Brand	Buyers Products
U-bolt bend	20in square bend
U-bolt diameter	5/8 in
Tie bar thickness	1/2 in forged steel
Hardware included	4 U-bolts, 8 hex nuts, split lock washers
Hardware grade	Grade 5 equivalent

Our Verdict

The UB623520 20in Square Bend U-Bolt Kit is a practical choice for anyone mounting truck boxes or connecting bodies to chassis who wants dependable hardware without specialty options. Its forged 1/2 in tie bars and complete set of fasteners make it a solid value for professional and DIY installers, though those needing stainless components for corrosion resistance should consider alternatives.

Frequently Asked Questions

Does the kit include everything needed to mount a truck box?
Yes, the package contains four 5/8 in U-bolts, eight hex nuts and split lock washers along with forged tie bars for a complete basic mounting set.

Are the tie bars durable enough for heavy loads?
Yes, the tie bars are forged 1/2 in thick steel and designed to provide superior strength for secure mounting and body-to-chassis connections.

Is the hardware stainless steel for corrosion resistance?
No, the kit uses Grade 5 equivalent hardware and is not specified as stainless, so additional corrosion protection may be advisable in harsh environments.