A bolt on stub axle c/w hub.

There are two possible sizes. Most equipment will be 35mm square but Logic feeders and some bigger trailers have 40mm square stub axles.

Option 1. (SA235D)

35mm square section ( Drilled) and center hole to center hole on the box section is 125mm. Distance from one stud to the next is 70mm centers. Distance across studs (PCD)  is 100mm Centers

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Option 2. (SA240D) As above but 40mm square section

New type which now incorporates Stud/nut.

NB. This will directly replace the older style where the studs were part of the hub with separate nuts.