Oh, yeah! I remember that drop-in bolt from "Out On a Limb." It looks a lot better in your collection than it did in situ. Excited that Randall and Tucker's hardware got upgraded.
3/8" x 1/2" (!) drop-in bolt from Out On A Limb (JT), HME hanger, old SMC hanger with 1/4" screwtop bolt, Cassin hanger, Leeper hanger with 1/4" bolt and square nut and homemade hanger with remnants of a Star Dryvin bolt (clockwise from top left).