Shackle Bolts

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$4.00 - $14.50

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Shackle Bolts for Caravan and Trailer

Shackle bolts for caravans and trailers sold by Couplemate are high tensile 9/16 inch, 5/8 inch, M16, M18 or M20.

Suits 45mm or 60mm eye to eye with nylon bushes or shackle springs with steel bushes (Al-ko Outback rebound Series.)

How do I measure my shackle bolt?

Measure from the tip of the thread to the underside of the hex head. 

Worn Hangers (5/8 inch or 16mm)

Yes, there is a fix for this problem.

  • Standard hangers use a 4-inch shackle bolt, measured from under the head to the thread’s top.
  • Cut the head off a centre hanger leaving 2 x halves left.
  • Use a 4.5 inch shackle bolt (701062) and bolt the two halves over the existing hanger.
  • Weld the two 1/2 inch plates over the old worn hangers.
  • The problem is now fixed.

Sizes on offer

  • 1/2 inch Case Hardened – 3.5 inch
  • 9/16 inch Non-Greasable – 3.5 inch – Grade 8 High Tensile
  • 9/16 inch Greasable – 3.5 inch – Grade 8 High Tensile
  • 5/8 inch Greasable Short – 3.5 inch to suit 45mm tandem rocker centre bolt – Grade 8 High Tensile
  • 5/8 inch Greasable – 4.25 inch to suit Manutec Rocker Roller Springs – Grade 8 High Tensile
  • 5/8 inch Greasable Long – 4.5 inch – Grade 8 High Tensile
  • 3/4 inch Greaseable – 3.5 inch – Grade 8 High Tensile

Non-greaseable bolts fit inside a self-lubricating nylon bush and do not need grease. If your springs have nylon bushes, it is not advisable to change your pin to greaseable.

The knurl under the head has a particular purpose. The knurl locks into the shackle plate to help prevent the bolt from spinning during spring compressions. Broken welds are a good sign the bolts need replacement.

The knurl is welded onto the shackle plate on standard tandem and outback trailer springs to stop the bolt from turning. With a rotating bolt in the shackle plate, wear significantly increases.

News: How to fix Dangerous Caravan Vibration Fatigue

How to tighten suspension bolts.

  • Tighten 16mm x 100mm greaseable bolt until home.
  • Back off 1/4 turn.
  • You need a small space between your shackle plates and spring; otherwise, you will develop an annoying squeak.
  • This squeak is due to no tolerance between shackle plates and spring.

Associated Shackle Bolt Parts

Purchase Electrogal 4-inch shackle bolt kits from our trailer parts range here.

Note: The above shackle plate kits are laser cut, welded then plated by Couplemate.

Replacement Shackle Bolts, Caravan Trailer Kits

Our Service Lifetime Warranty

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.

Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.

Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.

60-Day Returns

After 60 years of experience, we know that life has its unpredictable moments.

All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.

You can view our full policy for change-of-mind returns here.


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