3"-4 Multi-Start Nut And Bolt

This is a 3"-4 multi-start thread hex nut and hex bolt. It uses is a tri-start thread.

The bolt should be 8.000" (203.20mm) in length and the nut should be 2.953" (75.0062mm).

Update 4/4/2024: Increased the nut thread pitch for 3D printing.

Please post a make.