A small low profile machine vise

Step 6 Screw

The clamping screw is threaded 3/8"-20 left hand. I used the tapped hole in the nut for a gauge since it's easier than measuring the pitch diameter with wires so it's probably oversize. I bored the housing but the outside is just sawed and filed to shape. The 5/8" collar on the end of the screw is press fit, and the thrust washer is also press fit into the housing, after filling it with grease. I didn't find the small shaft collar until afterwards so I had to make it shorter it to fit the screw.