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What thread pitch to use

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I guess some people have lower thresholds of "exact" :laugh:
 
Roger, I glanced through that link. One thing puzzles me: why does imagining 1 inch = 25.6 mm make conversion any easier than accepting the fact that 1 inch = 25.4 mm? I mean, doesn't just about every cell phone and computer have a calculator function built in? :laugh:
 
Just received two terrific thread gauges in the mail from the bolt Depot. One is US thread gauge, and the other is metric thread gauge. Plastic, well designed and made, well marked, and very inexpensive. They have helped me go through my odds and ends collection of bolts and sort them out by size, thickness, and threads per inch.
 
Plastic, how do they get the teeth small enough to do 32,36,and 40 TPI
 
Somebody posted a herald for sale a while ago and this was one of the pics
Want a copy??
grin.gif
 
Don,

The guage doesn't go that small. The US gauge has the following TIPs: 4 1/2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 20, 24, 28.
 
Should be readily available from any place that carries threading tools. For example, MMC has a variety of them available, covering UN, Whitworth, Metric and even Acme threads.
 
DNK said:
Do you have a nut and bolt store?
Click to expand...
Yeah, it takes up about 6' of wall space in my garage.
 
You should be able to pick up one of those thread pitch gauges at Sears. they're in with the tap and dies. there will be 2 of them. one for SAE, one for metric.
 
This is a small town, so no nut and bolt stores. Even our Sears is a very small, mainly catalog store. I'll look on the internet for Sears.

Thanks.
 
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