I'm using these now: https://www.nord-lock.com/globalassets/mediavalet/web-assets/downloads/brochure/superbolt-nxt-brochure---english2.pdf https://www.nord-loc

I'm using these now: https://www.nord-lock.com/globalassets/mediavalet/web-assets/downloads/brochure/superbolt-nxt-brochure---english2.pdf https://www.nord-lock.com/globalassets/mediavalet/web-assets... ... much better than a spring washer. See also: https://en.wikipedia.org/wiki/Multi-jackbolt_tensioner https://en.wikipedia.org/wiki/Multi-jackbolt_tensioner