https://www.jjacksontools.com/en/992-clamping-nuts-for-chucks-for-er40-precision-collets?l=5021
992 - Clamping nuts for chucks for "ER40" precision collets | woodworking tools online shop
clamping nuts
https://www.schaaf-gmbh.com/en/joining-elements/custom-solutions/clamping-nuts/
Clamping Nuts - SCHAAF - Leading joining technology
Oct 18, 2023 - Several cylinders are arranged on a ring structure and that these are either clamped or released by hydraulic pressure.
clamping nutsschaafleadingjoiningtechnology