Lower steering shaft UJ bolts

Birdbrain

Well-Known Member

Posts

462

• Apr 19, 2023

• #1

I’m having to replace my lower steering shaft UJ,s again for 2nd time in just over a year. Replacement parts were Britpart & the UJ,s have failed already. Bought OEM ones this time that don’t come with new nuts & bolts. Can anyone help me with the size and whether or not they’re high tensile?

 

miktdish

Guns n Chainsaws

Full Member

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4,630

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Near Lanark, South of Glasgow. Scotland

• Apr 19, 2023

• #2

Stainless would do in that situation as there is only mild tensile/compression strength required.
I think I have an A4/80 M6 shoulder bolt in mine with a form C washer each side and a type P, deep, lock nut.
I think the original was a 1/4" (6.5mm).

Measure the hole ...

 

Last edited: Apr 19, 2023

Birdbrain

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462

• Apr 19, 2023

• #3

Yes, I was thinking of stainless.

 

tottot

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8,115

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west wales coast

• Apr 19, 2023

• #4

Do not think stainless as this is a steering item and should be as the manufacture made. Although the shaft groove locates the joint the bolt has to be tight to prevent movement on the spline. 30 - 35 nm.

 

miktdish

Guns n Chainsaws

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Near Lanark, South of Glasgow. Scotland

• Apr 19, 2023

• #5

@tottot is right ... if the bolt needs 30Nm then stainless is no good at all as the max is around 20Nm ....

 

v8250

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6,872

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Deepest Darkest...

• Apr 19, 2023

• #6

@Birdbrain , if you want st/st you can but it must be A4-80 grade bolts and do not use nyloc washers, use a st/st washer +spring washer + full length nut with at least three full turns of thread showing and do use Loctite. A4-80 have 600Mpa tensile strength and only buy from approved suppliers. I have been using A4-80grade for many years and never had a bolt or screw fastener fail. Try these guys to buy https://www.boltking.co.uk/a4-80

 

miktdish

Guns n Chainsaws

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Near Lanark, South of Glasgow. Scotland

• Apr 19, 2023

• #7

I get most of my SS fasteners from here ... https://www.spaldingfasteners.co.uk/a4-80-stainless-steel/

 

Birdbrain

Well-Known Member

Posts

462

• Apr 20, 2023

• #8

Cheers guys. We used a lot of stainless fittings at work before I retired so still have contacts with local suppliers. They’ve supplied me with core T bolts for propshaft UJ’s when a well known parts supplier sent the wrong ones !