Shackle Bolts | 1/2″ | 9/16″ | 5/8″ | 16mm | 18mm | 19mm
Shackle bolts for caravans and trailers sold by Bartel Trailers are high tensile 9/16″, 5/8″, M16, M18 or 3/4".
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.
Sizes on offer
- 9/16″ Non-Greasable – 3.5″
- 9/16″ Greasable – 3.5″
- 5/8″ Greasable Short – 3.5″
- 16mm Non-Greasable – 100mm
- 16mm Greasable – 100mm
- 5/8″ Greasable Long – 4.50″
- 18mm x 90mm Rocker Roller centre pivot for AL-KO and Couplemate
- 18mm – Standard Tandem – 100mm (Al-ko Standard Tandem 710 springs)
- 3/4"x 3.5"mm for rocker roller centre pivot bolt
The 16mm Greaseable Bolt suits a variety of leaf springs where a situation of metal on metal exists. Example, rocker springs and outback springs have a metal roller or bush that requires a greaseable bolt.
Non-greaseable bolts fit inside a self-lubricating nylon bush and do not need grease. If you springs have nylon bushes, it is not advisable to change your bolt 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.
On standard tandem and outback trailer springs, the knurl is welded onto the shackle plate to stop the bolt from turning. A rotating bolt in the shackle plate, wear significantly increases.
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How to tighten a shackle bolt.
- 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.