4PCS Square U-Bolts 2.5in Wide Leaf Springs 8.75in Long - Durable Zinc

In this review the 4PCS Square U-Bolts are judged as a practical, no-frills replacement for owners of late 1980s through 2019 Chevy and GMC 1500 trucks who need reliable suspension hardware. The bottom line: these zinc coated square U-bolts are best for routine rear lift block or leaf spring reassembly where correct fitment for 2.5in wide springs and a measured 8.75in length matter. The reviewer found them straightforward to install, solidly threaded, and purpose-built for stock-style suspension work without extras that complicate selection.

Key Features

• Fitment: Designed specifically for 1988-1998 Chevrolet and GMC C1500 models and 1999-2019 Silverado and Sierra 1500 trucks, ensuring a correct match when vehicle selection is verified.
• Construction: Zinc coated square U-bolts resist corrosion better than bare steel, helping maintain clamp strength in typical road conditions.
• Size: The 8.75in length and 9/16in diameter are measured from the bottom of the bend to the thread end, giving consistent sizing for rear lift block and leaf spring reinstallation.
• Package: The set includes four square U-bolts with mounting hardware as shown, so buyers receive a full replacement kit for one axle installation.
• Application: Suitable for 2.5in wide leaf springs and usable on left, right, front or rear placements when the vehicle requires square U-bolt geometry.

Who It's For

This kit is for DIY truck owners, mechanics and hobbyists working on Chevrolet C1500 or GMC C1500 models from 1988-1998, and Silverado/Sierra 1500 trucks from 1999-2019 who need a direct-fit set of square U-bolts for leaf spring clamping or rear lift block reassembly. It suits those prioritizing proper sizing and corrosion resistance without paying for specialty mounting brackets or premium finishes.

Those who should look elsewhere include owners with nonstandard spring widths, custom suspension geometries, or who require stainless or plated finishes beyond zinc coating. Also confirm fitment using the vehicle tool before purchase if you run aftermarket lift kits with unusual clearances.

Pros & Cons

Pros

• Correct vehicle-specific fitment for many C1500, Silverado and Sierra 1500 years reduces selection errors.
• Zinc coating helps protect threads and bends from surface corrosion in regular driving conditions.
• Comes as a 4pc kit with mounting hardware, providing everything needed for a standard axle service.
• Solid 9/16in diameter and clear length measurement give predictable installation behavior.

Cons

• Not intended for applications that require stainless steel or specialty plated finishes, which may be preferred in coastal or heavy-chemical environments.
• Only fits 2.5in wide leaf springs and the specified truck models; incorrect fitment will require different hardware.

Specifications

Brand	BST BSSP
Part Type	Suspension Lift Kit / U-bolts
Fitment	1988-1998 Chevrolet/GMC C1500; 1999-2019 Silverado/Sierra 1500
Leaf Spring Width	2.5in
Length	8.75in (bend to thread end)
Diameter	9/16in
Finish	Zinc coated

Our Verdict

For owners needing straightforward replacement U-bolts that match common Chevy and GMC 1500 pickup years, this 4pc zinc coated kit represents solid value: it provides the correct 8.75in length, 9/16in diameter and mounting hardware in one purchase. It is recommended for routine leaf spring or rear lift block work where corrosion resistance and proper sizing matter, but buyers with specialized finishes or nonstandard springs should select a different option.

Frequently Asked Questions

Will these U-bolts fit aftermarket lift kits?
They fit 2.5in wide leaf springs and common factory-style lift block setups; confirm your spring width and clearance before using them with aftermarket components.

Do these include nuts and plates?
The package includes the U-bolts and the mounting hardware as shown, providing the standard components needed for installation.

How is the length measured?
Length is measured from the bottom of the bend to the end of the threads and is specified as 8.75in.