Special Bolt but unknown part number or purpose

Technical advice Q&A

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gmunro
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Location: Hillsborough, Northern Ireland
Great Britain

#1 Special Bolt but unknown part number or purpose

Post by gmunro » Thu Jan 18, 2024 8:46 pm

Hi gents,

I have two bolts, 2 3/8" x 7/16" (possibly UFB 131/19R) with a half depth head, which I set aside whilst stripping the rear suspension. I thought, (as I'm sure many of us have done), that these odd bolts were obvious where they went so I didn't put them in a bag and labelled them! Now I am on the rebuild of the entire rear suspension - diff, wishbones, drive shafts and cage and I now cannot remember where these two bolts go. I have attached a photo of the bolts and hope that any member that my have a suggestion will come back to me with advice. Lesson learned ....... bag 'em and label them !!!

Many thanks and here's hoping some kindly gent or lady will be able to help me and put me out of my misery.

Cheers :banghead:

George

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1967 Series 1 OTS

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Gfhug
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#2 Re: Special Bolt but unknown part number or purpose

Post by Gfhug » Thu Jan 18, 2024 9:13 pm

George, try looking at SNGB for part no C18296. No. 20 on here
https://www.sngbarratt.com/English/#/uk ... %5B7809%5D

Could that be it as it is described as a special, though slightly different length?
And I seem to remember item no 33 is a special bolt, either thin head or similar. Thought is that 1/2 inch?
Your suggestion UFB 131/19R is listed as 5/16 x 2 1/2.

Hope this might help

Geoff
S2 FHC Light Blue
S2 OTS LHD - RHD full restoration

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abowie
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#3 Re: Special Bolt but unknown part number or purpose

Post by abowie » Thu Jan 18, 2024 10:21 pm

C18296 as Geoff says. Thin head is for clearance.

It also looks a bit like C17149 which is the radius arm bush bolt, but that's 1/2" in diameter, so I think Geoff's right.
Andrew.
881824, 1E21538. 889457. 1961 4.3l Mk2. 1975 XJS. 1962 MGB
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

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bitsobrits
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#4 Re: Special Bolt but unknown part number or purpose

Post by bitsobrits » Fri Jan 19, 2024 12:00 am

I think they may be for the rear anti roll bar (ARB) drop link bushing to the end of the ARB.
Steve
'65 S1 4.2 FHC (early)

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Allrand
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#5 Re: Special Bolt but unknown part number or purpose

Post by Allrand » Fri Jan 19, 2024 5:03 am

Radius arm rear bush to wish bone. The thin head is recessed into the wish bone to clear the pivot shaft moulding of the hub carrier. Must be fitted before the hub carrier is connected to the wish bone.
Randall Botha
'64 3.8 fhc & '51 Mk 7

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