Help - fastener sizes needed

[Atrus]

I have two different fasteners that I am hoping you all can help me to size.

The first that I need would be the size of the 4 bolts that hold the cover over the brake and master cylinder pistons. I took this off years ago and have no clue where the bolts went.

The second would be the nuts that hold on the manifolds. I took my intake off, and two disappeared into the void of the engine bay. I think they are behind the grill, and I'd rather not disassemble at this point to get to them. I'll just pick up two more if they aren't a funky thread size.

Thanks!

 

[jlaird]

Not funky but brass.

 

[Atrus]

Is there a particular reason they are brass or were the Brits just feel saucy that day during design?

 

[jlaird]

Might have been to keep them from welding themselves to the studs?

 

[Atrus]

Bueller? Bueller? Anyone? (love that movie! Love the reskinned MG in it just as much!)

Any idea on the brake cover bolts? I have a nut for the manifold, so I could take that to the local hardware store and find a nut with the same thread. For the bolts, I don't have the same luck, I have none of them.

 

[Billm]

I am pretty positive that they (manifold nuts) are common 5/16-24 UNF threads. They are brass probably to minimize rusting (I have used steel as a substitute many times).
The ones for the m/c cover are sheet metal screws(????). Those I can't remember.
Bill

 

[jlaird]

Could pull a stud and take it along?

 

[Atrus]

thanks guys. Realistically, the nut on the manifold isn't a huge deal, I can bring one to the store, find a bolt to fit it, and then buy the corresponding sized nut.

The real problem is the cover over the footwell that goes over the pistons of the master cylinders.

 

[DrEntropy]

This is a WILD stab: Most of the captured nuts and attendant screws on the LBC bodies were #8-32 machine screws IIRC. Get one and try it?

 

[jlaird]

You'll like em in stainless but think they are 1/4 28 SAE fine. In any case they are only a few cents each, get a box along with a box of lock washers. About 5 dollars each.

 

[Atrus]

Thanks Doc and Jack, I'll just pick up 4 of each

 

[spritenut]

Depending on what year, 58-66 used 1/4 x 28s in the pedal box.
67-80 used 1/4 x 28s to hold the box in but 10/32 philips head screws to hold the cover on the top of the box. (access plate)

 

[Atrus]

Ah, so I have a '68, I'll look for 10/32. Thanks!