My clamp, (at 1 7/8″ down from the top) is: 1 1/2″ wide so, a bolt that has enough room for two washers and a wing nut would be: You don’t want it so long that it gets hung up on everything or so short that you can’t screw on the wing nut or open the jaws. Bolt: Length is the most important factor.Sources of ring clamps: Amazon, Contenti, Otto Frei, Rio Grande, FDJ On Time, etc. Plastic may work but, I haven’t tried it. Ring Clamp – make sure that it’s wood.You may need differently sized bolts, nuts and washers. Material sizes listed, are for what I used. With this adaptation, your work is held securely in place. The reason for performing this adaptation on your ring clamp is because the wedge, that usually comes with the clamp, falls out – usually at the most inopportune time. *Note: instructions, tools and materials are what I used for creating my ring clamp modification – your requirements may vary. Please see my page: DIY Jeweler’s Workholding System with a Ring Clamp and my short video on this subject. In case of large subscriptions, please contact us.The flat end of my ring clamp. We will be glad to send you any quantity.
If specified order number, please, it will add it to the selected type of goods. Type 2 - large wings for ease of turning.