Leaf Spring Axle U-Bolt & Tie Plate Kit – 2 Springs, 2" × 2" | 300-015975

Leaf Spring Axle U-Bolt & Tie Plate Kit – 2 Springs, 2" × 2" Axle

The EZ Loader Leaf Spring Axle U-Bolt & Tie Plate Kit, part number 300-015975, is an OEM replacement suspension mounting kit designed to secure two leaf springs to one compatible 2" × 2" square axle on EZ Loader boat trailers.

This complete kit includes (2) spring tie plates, (4) zinc-coated U-bolts, and (8) lock nuts, providing the mounting hardware for both leaf spring attachment locations on one compatible axle.

Whether replacing corroded mounting hardware, servicing a trailer suspension system, or rebuilding an axle assembly, this kit provides the specified components together under one EZ Loader OEM part number.

Complete Kit Contents – Hardware for Two Leaf Springs

• (2) Spring Tie Plates – One plate for each leaf spring mounting location.
• (4) Zinc-Coated U-Bolts – Two U-bolts for each spring mounting location.
• (8) Lock Nuts – Four lock nuts for each spring mounting location.

One kit services two leaf springs on one compatible axle. For tandem-axle trailers with four leaf springs, two kits are generally required, provided both axles use this same mounting configuration.

Product Details

Secure Leaf Spring-to-Axle Mounting

U-bolts and spring tie plates are essential components of a leaf spring trailer suspension system. Together, they clamp the axle and leaf spring assembly in the specified mounting arrangement, helping maintain proper axle positioning during normal trailer operation.

EZ Loader part 300-015975 supplies the mounting hardware for both spring attachment points on one compatible axle, eliminating the need to order individual U-bolts, plates, and lock nuts separately.

Zinc-Coated Hardware for Marine Trailer Applications

The included U-bolts feature a zinc-coated finish to help resist corrosion. Boat trailer suspension components are regularly exposed to road spray, moisture, and demanding marine environments.

Regular inspection of spring mounting hardware is important, particularly when trailers are frequently launched in saltwater or stored outdoors. Check for rust, damaged threads, loose fasteners, distorted tie plates, and evidence of movement between the spring and axle.

How Many Kits Do You Need?

• Single-Axle Trailer: One kit for two compatible leaf springs.
• Tandem-Axle Trailer: Two kits for four compatible leaf springs.
• Triple-Axle Trailer: Three kits for six compatible leaf springs.

These quantities assume each axle has two leaf springs and uses the same 2" × 2" axle mounting configuration. Confirm compatibility for each axle before ordering.

Fitment and Installation Information

This kit is identified for compatible EZ Loader boat trailer leaf spring suspensions with a nominal 2" × 2" square axle tube. Axle tube dimensions alone do not guarantee fitment.

Before ordering, verify the existing U-bolt inside width, thread diameter, leg length, spring width, and tie plate hole spacing. Compare the original suspension arrangement with the intended replacement hardware.

Installation Safety: Suspension mounting hardware must be installed and tightened according to the applicable EZ Loader and axle manufacturer specifications. Do not substitute generic torque values. Use proper support equipment during suspension service and follow manufacturer requirements for inspection and rechecking fastener torque.

Ordering and Fitment Assistance

Sold as one complete kit: (2) spring tie plates, (4) zinc-coated U-bolts, and (8) lock nuts for two compatible leaf spring mounting locations.

For assistance identifying the correct EZ Loader suspension hardware, provide your trailer VIN, axle dimensions, and photographs of the existing spring mounting arrangement.

Independent EZ Loader Parts Dealer Notice

EZLoaderParts411.com is an EZ Loader OEM replacement parts supplier operated by 411MarineCom, Inc. and the 411Marine Family, serving customers since 1998 from Hardeeville, South Carolina.

411MarineCom is a high-volume independent EZ Loader trailer dealer and direct-to-factory source for new EZ Loader marine boat trailers, OEM replacement parts, and fitment support.

We are a dealer resource, not the manufacturer. Our team helps previous trailer customers and new customers identify the correct EZ Loader parts using trailer VIN details, photos, measurements, real trailer comparisons, hands-on parts experience, publicly available resources, our websites, and direct customer conversations whenever possible.