Bolt size

[browne92]

Someone just put a list of common bolt sizes in the 'Shop Made Tools' thread. Not wanting to clog up the thread with questions, I post here.

Wasn't there a 3/16" bolt or screw size at one time? I seem to remember buying all-thread in that size. But my remembery is old and not to be trusted.

Bill

[charlie gary]

Someone just put a list of common bolt sizes in the 'Shop Made Tools' thread. Not wanting to clog up the thread with questions, I post here.

Wasn't there a 3/16" bolt or screw size at one time? I seem to remember buying all-thread in that size. But my remembery is old and not to be trusted.

Bill

I believe it's known as 10-24 these days, but I still see a lot of 10-24 fasteners sold as 3/16".

[Dr Stan]

I believe it's known as 10-24 these days, but I still see a lot of 10-24 fasteners sold as 3/16".

#10-24 or in the case of UNF 10-32

[darryl]

I'm not sure if 10-24 is equal to 3/16, or if it's just close enough that you can't detect a difference. At any rate, it seems that everything smaller than 1/4 inch is rated like 10-24, 8-32, etc. I tried to find some 1/8 bolts once- seems those belong in another category- stove bolts.

[Duffy]

IT is not STRICTLY the same bolt size. In the "good old days," there used to be a set of bolt sizes that I knew as "stove bolts." They were, I think, 5/16, 1/4, 3/16, and 1/8. They were always fitted with square nuts. They seem to have been absorbed into the "common" sizes, and even 12-24 is pretty rare now.

[Bill Pace]

My "remembry" says that 12-24 was the same as 3/16 - in fact I think it measured out at .188.

If youve ever worked on old tools/machines, youll run into the 12-24. I recently reworked a SB 10L lathe and it (and many others) had that thread on the end of the cross and compound feed screws that odd rounded/slotted nut that held the handles on. Amazingly, I dug through my collection of taps and had one!

[JoeCB]

Number 12 screw has a major diameter of .216" the other "oldie" is #14 , major dia of .242.... while I'm at it ...#16 - .268 ... #18 - .294

These were in the old American Standard system
Joe B

[oldtiffie]

http://en.wikipedia.org/wiki/Unified_Thread_Standard

[JCHannum]

According to my 1924 Machinery's Handbook, fractional screws started at 1/16", and machine screws went to number 30. I believe machine screws went as high as number 50 at one time.

Both series could be had in course and fine threads as well.

[J Tiers]

Machinery's handbook......

#10 screw major diameter 0.190 ~~~ - 0.187 (3/16") for practical everyday use.