Heavy-Duty Shackle Bolt for Trailer Suspension – Sold Individually

The SP04-040 shackle bolt & nut kit is a critical suspension component used to connect your trailer leaf springs to hangers or equalizers.

This listing is for (1) single bolt & nut, perfect for replacing worn or damaged hardware without buying a full pack.

Designed for 2" wide slipper or double-eye leaf spring suspension systems, this bolt delivers secure fitment, proper articulation, and long-term durability for trailers rated from 3,500 lb to 8,000 lb axles.

🔩 Key Features

• ✅ Correct Size for 2" Wide Springs
  Industry-standard fit for common trailer suspensions
• ✅ 9/16"-18 Thread, 3.5" Length
  Proper sizing ensures safe suspension movement
• ✅ Includes Locking Nut
  Secure installation for high-load applications
• ✅ Heavy-Duty Steel Construction
  Built to handle road stress and repeated articulation
• ✅ Ideal for Repairs or Single Replacement
  Buy only what you need (no wasted hardware)

📏 Specifications (VERIFIED)

• Part Number: SP04-040
• Bolt Diameter: 9/16"
• Thread Pitch: 9/16"-18
• Length: 3-1/2"
• Application: 2" wide leaf spring suspension
• Includes: (1) bolt + (1) lock nut
• Material: Steel
• Finish: Plain or zinc (varies by supplier)
• Wrench Size: 7/8" hex

🔧 What This Bolt Does

• Connects leaf springs to hangers or equalizers
• Allows controlled suspension movement
• Keeps your trailer riding smooth and stable

👉 This is a wear item — replacing worn bolts improves safety and ride quality

🔍 FITMENT LOOKUP (BUILT-IN FOR CONVERSIONS)

✅ WILL FIT

👉 Designed specifically for 2" trailer suspension systems

🚚 COMMON TRAILER TYPES

• Utility trailers
• Enclosed cargo trailers
• Equipment trailers
• Dump trailers
• Car haulers

🏷️ COMMON BRANDS USING THIS SIZE

• Dexter axles
• Lippert / LCI
• AL-KO
• Rockwell American
• Redneck Trailer Supply builds

🔁 CROSS REFERENCE

⚠️ WILL NOT FIT

• ❌ 1-3/4" spring setups (use shorter bolt like SP04-020)
• ❌ 7/8" heavy-duty suspension systems
• ❌ Wet bolt kits (this is standard, non-greaseable)

🧠 QUICK FITMENT CHECK

This bolt WILL fit your trailer if:

✔ Your springs are 2" wide
✔ Your bolt diameter is 9/16"
✔ Your bolt length is around 3.5"

📦 What’s Included

• (1) Shackle Bolt
• (1) Lock Nut

Need trailer suspension parts fast?
AAA Trailer – Howell, Michigan supplies professional-grade trailer parts nationwide.

✔ Serving: Detroit, Lansing, Ann Arbor, Flint, Grand Rapids
📞 Call/Text: 517-225-1991
🌐 Order Online: AAATrailer.com

What sets us apart is our dedicated team of knowledgeable professionals who are always ready to assist. Great customer service isn't just a promise—it's the foundation of our success. We invite you to visit our showroom or reach out for personalized advice. Whether you're purchasing online or stopping by, we're here to make your trailer journey seamless. Visit Us Today

• Address: 4675 East Grand River Ave, Howell, MI 48843
• Phone: (517) 225-1991 (Call or text)
• Hours: Monday to Friday: 10:00 AM - 5:30 PM | Saturday: By appointment

Thank you for considering AAA Trailer. We're excited to help you hit the road with confidence! If you have any questions, don't hesitate to contact us.

To deliver your favorite products, we have partnered with the UPS & FEDEX . We are ready to entrust them with your orders and are always on your side if something goes wrong.

 We will be happy to assist you with eligible returns, the return instructions, and the shipping address. If you need a return or exchange, send us an email so we can discuss a replacement.