6 replies to this topic

[1984mini25]

I'm after a few original 5/16 UNC x1" (the clutch cover ones are 1/4" too long) differential side cover bolts, as the ones I've removed aren't good and have ruined the threads in the gearbox casing (since helicoiled) I could just buy new ones, but those have a 1/2" across flats head, as apossed to the standard 7/16" head size of the standard ones.

[DeadSquare]

When a friend brought me some boxes of bits and asked me to rebuild his father's engine, I said "Yes" too soon.

 

Apart from the studs in the block, there were no nuts or bolts, so I bought an assortment of washers, studding, nuts and locktite.

Edited by DeadSquare, 26 May 2026 - 10:00 AM.

[stuart bowes]

can you not get the ones that are 1/4" too long and just cut them down.  give the ends a slight bevel so it goes in the thread nicely

[Cooperman]

I always use the 1/2" AF bolts with a spring washer as fitted on all the earlier cars.

[GraemeC]

How many do you need?  I should have some.

 

They are available new, listed as 1" long (I know there are some slightly longer clutch cover ones too):

https://www.minispar...h-end-cover-unc

Edited by GraemeC, 12 June 2026 - 01:52 PM.

[1984mini25]

How many do you need? I should have some.

3, one to replace the one with knackered threads and 2 to replace the odd ones with the sunken heads that also appear to be softer/easier to round off (yes I know no one is going to notice two of the bolts have odd heads, but my ocd will)

Edited by 1984mini25, 13 June 2026 - 10:26 PM.

[GraemeC]

Sorry - just seen this.
Let me have a look in the drawers.....

 

Got some - pm me

 

Edited by GraemeC, 09 July 2026 - 02:20 PM.