Used shape sl-68 2 stainless bolt, with oring, with allen screw. Check your hammers front portion of the smaller id (there is a small stop portion at the very back where the hammer meet the powertube, the portion to check is right in front of that). Od on the anti kink portion of this hammer is .31., one included, for gen 1 sl-682, not sure about gen 2 sl-68 2
