I'm after some accurate dimensions taken from an ORIGINAL M20 front tank mounting bolt...

I know they are 5/16" Cycle thread...What I need is the length under the head, the length of the threaded section (if not fully threaded), the hexagon dimensions across the flats and the overall length. I also need to know if they have the 'shallow dome' head form typical of many BSA fasteners...

I would stress....Dimensions must be off an original bolt. I have all the other parts of the front tank mount NOS...

Any help appreciated....Ian

I have a few NOS bolts, finding them might take a while but I'll do the best I can.

Henk

email (option): ahum@quicknet.nl

Found them, measurements and photo send.

Henk

email (option): ahum@quicknet.nl

email (option): robmiller11(at)yahoo.co.uk

Well it should be easy. Henk keeps most of his bike and car stuff in his sitting room. Trouble is Linda keeps moving things when she dusts...Tut! Women! Ron

email (option): ronpier@talk21.com

Hello Henk,

can you send me a photo from the bolt as well, because I like to see how it's made. I never have seen those before.

Richard

email (option): bsa-m20@libero.it