Blacksmith Daniel Tokar at the Willow Forge in Shepherdstown WV shows antique taps and dies and explains how they were used and how they changed over time.Late 1700's to modern tools.
History of the development of standard pitch and thread form in a general overview.
Early gunsmith, wagon screws and bolts, Whitworth standards and why early tools had to have a greater range of usable size stock.
Негізгі бет Blacksmith Dictionary , 250 years of making nuts and bolts
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