I just picked up a Boice Crane jointer, circa 1950s. I need to find a set of short bolts to hold the knives in place. The bolts are 1/4 inch in diameter with 28 threads per inch. The threaded length is 1/4 inch. The most important thing is that the hex heads are smaller than standard-size bolts, and fit a 5/16 wrench. Does anyone have a source for these? I've tried Lowe's, Fastenal, etc but I can't find this size.
Thank you in advance for any help you can offer!
Craig