Hi Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
JamesWilson
Yoda
Offline
[ QUOTE ]
Not even quite sure I know what a thread angle is.
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The thread angle is the angle formed by the thread > and how "pointy" it is. 55 degrees is pointier than 60 degrees. The strength of the thread is affected. The 60 degree angle is easier to consistently manufacture. I commend to your attention the book "One Good Turn: A Natural History of the Screwdriver & the Screw" by Witold Rybczynski, Simon & Schuster, 2000 and the article "At the Turn of a Screw" by Bruce Sinclair in Technology & Culture, Vol. 10, 1969 for a disquisition on the importance of these tools and fasteners. Sinclair discusses the differences between American and British engineering practices and the rationales used in establishing the standards used.
Not even quite sure I know what a thread angle is.
[/ QUOTE ]
The thread angle is the angle formed by the thread > and how "pointy" it is. 55 degrees is pointier than 60 degrees. The strength of the thread is affected. The 60 degree angle is easier to consistently manufacture. I commend to your attention the book "One Good Turn: A Natural History of the Screwdriver & the Screw" by Witold Rybczynski, Simon & Schuster, 2000 and the article "At the Turn of a Screw" by Bruce Sinclair in Technology & Culture, Vol. 10, 1969 for a disquisition on the importance of these tools and fasteners. Sinclair discusses the differences between American and British engineering practices and the rationales used in establishing the standards used.
