Spaenaur offers 1" dowel pins with on end tapped 5/16-18x3/4" deep. They come in lengths of 2",3",3.5",4" and5". Case hardened to58-62 Rockwell C . They come in unit pkgs of 5, split pkgs. are available but at a greater cost.
They can be found on page E88. Dowell Pins,Pull
http://www.spaenaur.com/
They can be found on page E88. Dowell Pins,Pull
http://www.spaenaur.com/
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