Video: Drill and tap your blade retention screw

[Thorgal Pain]

If you are planing on geting the pieces (hilt) anodized, a regular tread will do but, if not then i would go for an ACME tread, it is thicker ans sturdier than the regular tread but harder to engage the male and female treads togeter.
Cant tell you which to use since i dont know the OD of the male part. Hope this helps.
I forgot to mention that if you decide to get pieces anodized you should check with the company that will do it for type and thickness to adjust your treading accordingly.