iBroPrat Trailer Shackle Kit for Double-Eye Spring Tandem 3,500–7,200 lb — 2-9/16" Straps, 14-Bolt Complete Set

Complete 14-bolt trailer shackle kit designed to replace or repair double-eye spring tandem suspensions rated between 3,500 and 7,200 lbs.

This iBroPrat kit brings together every fastener and component you need for a tandem-axle double-eye spring setup so you can complete a repair without hunting down parts. The set includes shackle straps, triangle equalizers, nylon bushings, bolts and self-locking nuts with corrosion-resistant finishes and precise machining for straightforward installation and long service life.

Will this kit fit my trailer's double-eye springs?

The kit is sized for common tandem-axle double-eye spring systems covering gross axle configurations rated 3,500–7,200 lbs. It fits springs that accept 2-9/16" shackle straps and use 9/16" hardware, a standard arrangement on many utility, cargo, and boat trailers.

• 8 shackle straps at 2-9/16" width for typical double-eye springs
• 2 triangle equalizers at 7-3/4" length for tandem suspension balance
• 14 9/16" bolts and 14 9/16"-18 self-locking nuts—matches tandem equalizer/hanger requirements
• 8 nylon bushings sized for 9/16" pins to reduce metal-on-metal wear

How durable and weather-resistant are the parts?

Components are manufactured from hardened steel and finished with a black oxide treatment to resist rust and corrosion in typical road conditions. High machining accuracy reduces play and ensures parts sit correctly under load, lowering wear and improving reliability over time.

• Black oxidized surface for basic corrosion resistance
• Hardened steel straps and equalizers for wear resistance
• Nylon bushings that limit abrasion and reduce noise
• Self-locking nuts to maintain clamping force through vibration

What exactly is included and why are there 14 bolts?

This kit supplies a complete hardware set for most tandem-equalized double-eye spring assemblies, which commonly require multiple fasteners for both springs and equalizer connections. Many partial kits leave you short of the number of bolts and nuts needed; iBroPrat provides the full complement so you can do the job in one visit.

• 8 shackle straps (2-9/16") for spring-to-chassis mounting
• 2 triangle equalizers (7-3/4") for load sharing across axles
• 8 nylon bushings sized for 9/16" bolts
• 14 9/16"-3 x 3" long shackle bolts and 14 9/16"-18 self-locking nuts

Who this kit is for: this set is intended for trailer owners, mechanics, and fleet managers who service tandem-axle trailers with double-eye springs and need a complete, off-the-shelf hardware solution. It's ideal when you want to replace worn shackles, refresh nylon bushings, or rebuild the equalizer assembly without sourcing individual pieces. If your trailer uses 9/16" shackle hardware and 2-9/16" strap spacing, this kit will let you complete the repair in one trip, with the required number of bolts and nuts included.