XJ6 & XJ12 Series I, II & III 1968-1992
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Bolt help: Sizes and threads

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Old 02-22-2017, 10:29 PM
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Default Bolt help: Sizes and threads

Looking for specs on a few bolts:

the nuts that holds the rear subframe to the subframe mounts (5/16 UNF)
the bolts that hold the lower plate to the rear cage (5/16 UNF)
the nuts that hold the lower wishbone to the differential (1/2 UNF)

radius arm to body bolt
radius arm to lower wishbone
nuts that hold stub axle to diff
 

Last edited by sunchip; 02-23-2017 at 08:35 PM.
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Old 02-23-2017, 04:02 AM
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1) 5/16"UNF
2) 5/16"UNF
3) What nuts?, the wishbone is pivoted on a pin that passes through a cast bracket and the cradle. Those PIN nuts, front and rear, no idea, but 1/2"UNF sounds about memory right. The cast bracket is held to the diff casing by Special tapered seat bolts that are a Whitworth thread, from memory again.
 
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Old 02-23-2017, 08:36 PM
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add three more that i need specs for. also what lenghts are the bolts that hold the plate on?
 
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Old 02-24-2017, 04:46 AM
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The 8 that thread direct into those cast bracket "feet" are about 1" +/- whatever is in the tray at the time I want one, not critical in any langusge. Spring washers under the heads.

The others, and I think??? 8 again are probably 1 1/4" with nyloc nuts. Again, not critical, as long as they are long enough for the nyloc to bite into 2 or 3 threads.
 
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Old 02-24-2017, 04:51 AM
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Originally Posted by sunchip
Looking for specs on a few bolts:

radius arm to body bolt
radius arm to lower wishbone
nuts that hold stub axle to diff
1) GUESS, 7/16UNF
2) Special bolt with the head machined to slide past the shocker tube, never lost one, never needed to find one. Measure the inside diameter of the bush in the control arm, probably 1/2", maybe 7/16, and the thread will be UNF. Length, dunno.
3) 3/8"UNF, memory again.
 

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