@thegreatgalling - are you referring to one of these?
It's a 10-32 x 3/8", with 1/4" threaded and 1/8" unthreaded at the neck. They were standard on the OWK1 prior to circa 2013/2014'ish. I'm pretty sure they were a custom jobbie for that model, not entirely sure, but they're not on McMaster or anyplace like that.
Fortunately, you can make them fairly simply: get a few
10-32 x 3/8" Button Head screws, fill the heads with solder and chuck em in a drill and spin-file it to shape. You may have to take a few thousandths of an inch off the threaded end, since they're a fraction longer than the custom screws and protruded in the blade well a miniscule bit. Otherwise, bam, custom screws.