GSO Spider screws

[MarkInSpace]

I’m hoping to replace the 3 screws in my GSO 10” reflector- currently they have Philips head tops (which seem to slip a bit), I’m wanting to use hex keys.
Can anyone confirm the thread? I think they are M4. Is there anything special about them? Will any m4 screw work, provided it’s long enough?
Also, steel vs stainless - would it make a difference?

[Joshua Bunn]

I cant confirm what thread they are, although the primary collimation screws are m4 x 0.7mm pitch.
I cant see them being anything special, unless they are brass tipped, which I highly doubt it. Just make sure you get the right pitch, and stainless preferably with the A4-70 marking on the head.


Regards
Joshua

[Marko of Oz]

Are Bob's Knobs still a thing? Less chance of dropping a tool onto your primary.

[Leo.G]

It seems they are:


http://bobsknobs.com/Newt/styled-2/MLB8.html

[MarkInSpace]

Thanks for that, Leo!

[I.C.D]

Hi Mark if you have any doubt about any screw or bolt size take one out and take it to a screw and bolt specialist (like we have in the hunter Valley(Newcastle Nuts & Bolts and washers) a great place ,their should be one in Melbourn some were.