RJSPHH Trailer Axle Spring Shackle Greaseable Bolt 9/16 x 3 (14 pcs) – Grease Zerk

Overview

The RJSPHH Trailer Axle Spring Shackle Greaseable Bolt combines rugged hardware with practical lubrication features designed for reliable trailer suspensions. This 9/16 x 3 bolt includes a grease zerk, a knurled shoulder to prevent rotation, and a lock nut for secure mounting. Its greaseable end makes routine service straightforward, helping you keep the suspension moving smoothly through daily use and longer trips.

Key benefits at a glance

• Greaseable end with zerk: convenient lubrication without disassembly
• Knurled shoulder: helps prevent bolt rotation inside the hanger bracket
• Lock nut included: maintains secure fastening under vibration
• Drilled end with grease zerk: easy access for lubrication on the go
• Broad compatibility: supports multiple axle configurations from common trailer types
• 1-year warranty and responsive support: assistance when you need it

Real-life uses and scenarios

Designed to mount either double-eye or slipper-style springs to hanger brackets or equalizers, this bolt suits a range of trailer setups from lightweight utility trailers to larger work trailers. The 0.5625-inch outside diameter and M12-1.75 thread provide a robust fit for many brackets, while the grease zerk end simplifies routine servicing in the field or at the shop.

Practical situations include post-trip maintenance after long highway hauls, seasonal upkeep in winter conditions, or upgrades to refresh an aging suspension. The greaseable design supports regular lubrication needs in both protected environments and more rugged settings, offering straightforward serviceability and dependable functionality.

Specification highlights

• Outside Diameter: 0.5625 inches
• Thread: M12-1.75
• Grease zerk and lock nut included
• Drilled end for lubrication access
• Recommended for 2000–7000 lb axle systems
• 1-year warranty; responsive 24-hour support

If you have installation or compatibility questions, our support team is ready to help. This bolt is designed to help maintain smoother trailer suspension operation, without implying guaranteed results.