EZ Loader Leaf Spring Bolt & Bushing Mounting Kit 9/16-inch Bolts — Nylon and Steel Bushings, Black, 2 Sets

EZ Loader 300-015973 is a complete leaf spring bolt and bushing mounting kit containing two 9/16" bolts and nuts, plus paired nylon and steel bushings sized for EZ Loader boat trailers.

This OEM-style mounting kit is designed for EZ Loader boat trailers that use a 9/16" mounting bolt. It supplies the fasteners and dual-material bushings needed to replace worn or corroded spring hardware, restoring proper alignment and load transfer between the leaf spring and mounting bracket. The kit is finished in black and includes two complete sets for one axle or both sides of a single spring perch.

Will this kit fit my EZ Loader trailer?

If your trailer uses a 9/16" spring mounting bolt, this kit fits without modification. Trailers with a 1/2" hole will require enlarging the hole to accept the included 9/16" bolts. Always verify bolt diameter before installation to avoid improper fit or damage.

• Includes two 9/16" bolts and two matching 9/16" nuts.
• Designed for EZ Loader trailers that specify 9/16" hardware.
• 1/2" bolt holes must be drilled to 9/16" to install these components.
• Two complete sets provided—enough for one spring perch or paired sides.

What are the bushing materials and sizes?

The kit pairs nylon and steel bushings so you get resilient spacing plus a hardened inside sleeve for the bolt. Nylon cushions movement and resists corrosion, while the steel sleeve maintains bolt alignment under load. Exact dimensions are provided so you can confirm clearance and fitment before purchase.

• Nylon bushing outer diameter: 1.00" and length: 1.75" for cushioning and wear resistance.
• Steel bushing inner diameter: 0.59" and length: 1.96" for a stable bolt sleeve.
• Combination prevents metal-on-metal wear while keeping the bolt centered.
• Black finish on hardware for corrosion resistance and clean appearance.

How does installation typically go and what tools are needed?

Installation is straightforward for mechanically inclined users: you remove the old bolts and bushings, insert the nylon and steel bushings into the leaf spring eye or bracket, then drive the 9/16" bolt and secure with the nut. If your hole is undersized, drilling to 9/16" is required. Use proper torque, safety supports, and corrosion-resistant thread practices when reassembling.

• Basic tools: socket/wrench set for 9/16" hardware and appropriate torque wrench.
• If needed: drill or reamer to enlarge a 1/2" hole to 9/16" for proper fit.
• Support the axle and springs safely before removing hardware.
• Apply anti-seize or suitable lubricant on threads for longevity.

Who is this for: This mounting kit is meant for EZ Loader boat trailer owners, marina maintenance crews, and DIY mechanics who need OEM-compatible replacement hardware for leaf spring mounts. It suits trailers already built for 9/16" bolts or owners willing to modify a 1/2" hole, and is ideal when you want a durable, paired nylon-and-steel bushing solution to reduce play and wear in the spring attachment.