Why isn't 11/32 more common in wrench/socket sets?

[Sugarfryz]

I'm lost here and just out of curiosity what is the difference between a "numbered" fastener and a regular bolt. One you lift say holding a caliper bracket in place

 

[Outlawmws]

Leaving the metric sizes out of it; fractional sizes start at 1/4" generally, and go up from there, 3/16 is an obsolete size very nearly a No.12 IIR, then 10, 8, 6, 4, etc, for smaller "Machine Screws" I've used 4-40 through 0-80 sized screws extensively in design and occasionally for my own use. (The number after the dash is the threads per inch)

If you can lay hands on Machinery's Handbook, any edition, this is all covered in the the threads section

 

[ssdave]

My sets have 11/32" combination wrenches in them..... I didn't check, but I'm sure my ignition wrench sets also have them. But, no 11/32" 3/8" drive sockets. 1/4" drive has them, though.

 

[pstemari]

... 3/16 is an obsolete size very nearly a No.12 IIR, then 10, 8, 6, 4, etc, for smaller "Machine Screws"

3/16 is a wee smidge smaller than a #10.

The numbers start at 0.060" for #0 and go up by 0.013" for each number. #7, #9, #11, and #13 are totally obsolete, #14 is extremely rare, and #3, #5, and #12 are unusual.

0-80 UNF: 0.060"
1-64 UNC/1-72 UNF: 0.073"
2-56 UNC/2-64 UNF: 0.086"
3-48 UNC/3-54 UNF: 0.099"
4-40 UNC/4-48 UNF: 0.112"
5-40 UNC/5-44 UNF: 0.125"
6-32 UNC/6-40 UNF: 0.138"
8-32 UNC/8-36 UNF: 0.164"
10-24 UNC/10-32 UNF: 0.190"
12-24 UNC/12-28 UNF: 0.216"

There's also 00, 000, and 0000 UNF screws. I don't recall the pitches for those off-hand, but I believe they are 0.047", 0.034", and 0.021".




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[NoahG]

My sets have 11/32" combination wrenches in them..... I didn't check, but I'm sure my ignition wrench sets also have them. .

Oddly, my set of combo ignition wrenches doesn't include 11/32", but it looks like the 4-way style sets do.




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