Help with a Tightening Knob question

Started Nov 16, 2012 | Discussions thread
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Damianicus
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Help with a Tightening Knob question
Nov 16, 2012

I bought a beauty dish with a flash attachment and the base tightening knob broke. It's a tight set of screw threads measured to what seems like 3/16th.

I took a base tightening knob off an umbrella stand and used it in the beauty dish so I'm assuming this is a common size thread.

Well I've tried twice now to order a replacement on Amazon and both were too big so I'm doing something wrong.

So, Q is what size is this (seemingly standard) tightening knob and does anyone know where to buy more?

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