20-04-2018, 08:38 AM
Erich, Couldn't you use 1/4" UNC rivnuts/nutserts for this? They're commonly available along with the hand held setting tools on your side of the pond -1/4" UNC and 1/4" Whitworth are both 20 TPI. If you do find that the Whitworth bolts are a bit tight in the hole (unlikely) you can just run a 1/4" whit tap through the nutsert/rivnut once it's set in the panel.
Engineering purists will decry putting 55° Whitworth fasteners into a 60° UNC threaded hole, but for attaching odd bits and bobs of bodywork, any loss of thread strength really isn't going to be an issue.
Engineering purists will decry putting 55° Whitworth fasteners into a 60° UNC threaded hole, but for attaching odd bits and bobs of bodywork, any loss of thread strength really isn't going to be an issue.