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Bolts for Vixen Dovetail plate


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I need a longer set of screws (about 25-30mm) to attach my new dovetail plate to my ES ED 127 tube rings. The screws are 1/4" but the threads are wider than anything they seem to have at B&Q. Anyone know what type of threads/bolts these are and where I can get them?

As an added complication I could really do with the heads being shorter so I can slide my Baader counterweight along the dovetail. This may mean not using a hex bolt, which is fine by me as long as the new screw/ bolt fits.

Edited by Commanderfish
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The thread size on my SkyWatcher dovetail bar are 1/4" x 20 UNC.

Many of the DIY superstores stock metric threads only. I get my imperial fasteners from Westfield Fastners Ltd or Model Fixings Ltd. They do them with many different head types and metals too.

I think the only imperial/metric thread that is 'universal' is a 3/8" BSW/10mm.

Edited by Philip R
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