Actually, Chuck raises a good point about changing plans to suit tooling/fasteners at hand. I cannot recall having built anything from plans that had odd fasteners but if I didn't think it would be detrimental to the finished product, then I would have no issues making changes.
I've got a ton of imperial fasteners which I am still sorting through in my late Father's workshop. From memory I have 5/16" bolts with several different thread pitches (20tpi, 22tpi, 26tpi in addition to the common 18 and 24 tpi). My research lead me to the discovery of the UNS (American National Special) thread classification, which essentially means that anything goes!
UNS would permit a manufacturer to make their own (non-standard) fasteners, so you have to buy replacement fasteners from them. Although, I'm sure there are other reasons for this.
One of the first things I do new is check what size/pitch taps I have on hand before deciding on what I am going to use on one of my projects.
I've got a ton of imperial fasteners which I am still sorting through in my late Father's workshop. From memory I have 5/16" bolts with several different thread pitches (20tpi, 22tpi, 26tpi in addition to the common 18 and 24 tpi). My research lead me to the discovery of the UNS (American National Special) thread classification, which essentially means that anything goes!
UNS would permit a manufacturer to make their own (non-standard) fasteners, so you have to buy replacement fasteners from them. Although, I'm sure there are other reasons for this.
One of the first things I do new is check what size/pitch taps I have on hand before deciding on what I am going to use on one of my projects.
Hunting American dentists since 2015.