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  #1  
Old 04-02-2023, 09:06 AM
Scratch Scratch is offline
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Default DIY nut/bolt checker?

Has anyone here made one of those nut and bolt checkers before? I was thinking about making one and looking for ideas.

https://www.amazon.com/Identifier-Th...cx_mr_hp_atf_m
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  #2  
Old 04-02-2023, 10:08 AM
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Shade Tree Welder Shade Tree Welder is offline
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Originally Posted by Scratch View Post
Has anyone here made one of those nut and bolt checkers before? I was thinking about making one and looking for ideas.
No. I have calipers and a thread gauge, all I need; and separate tools are much more versatile. Don't waste your time.

https://www.amazon.com/ChgImposs-Imp...%2C2424&sr=1-3

https://www.amazon.com/Measuring-Sta...%2C1162&sr=1-5
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  #3  
Old 04-02-2023, 12:56 PM
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toprecycler toprecycler is offline
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Quote:
Originally Posted by Shade Tree Welder View Post
No. I have calipers and a thread gauge, all I need; and separate tools are much more versatile. Don't waste your time.

https://www.amazon.com/ChgImposs-Imp...%2C2424&sr=1-3

https://www.amazon.com/Measuring-Sta...%2C1162&sr=1-5

These work pretty well. There are only a couple really close sizes between a couple metric and Imperial sizes, where they can almost be interchangeable. Especially trying to determine a female thread.

Always make sure you keep a spare battery on hand for the digital caliper. The digital ones are nice for switching from metric to imperial numbers quickly, so you can be comfortable in the units you are familiar with. Otherwise, the battery will always be dead the one time you pick it up once a year.

I just picked up one bolt and screw of each size at the bulk bolt bin at hardware store years ago, and drilled a block of aluminum to hold them for my sample test threads. It comes in handy for that quick verification.


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  #4  
Old 04-02-2023, 01:10 PM
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Quote:
Originally Posted by Shade Tree Welder View Post
I have calipers and a thread gauge, all I need; and separate tools are much more versatile.
You can find thread gauges among the drill bits at ACE Hardware, or at least my ACE has them. Don't buy the cheapy "disks with holes" because they are not worth the aggravation.

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Originally Posted by toprecycler View Post
Always make sure you keep a spare battery on hand for the digital caliper.
I have become adept at just taking the battery out after use.

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Originally Posted by toprecycler View Post
I just picked up one bolt and screw of each size at the bulk bolt bin at hardware store years ago...
While I can usually tell by looking and whether it threads on easily or not, I have an asst of nuts/bolts I keep around for sizing. Mine are in ziplocks either labeled "std" or "metric" and kept near the tap/die sets. No elaborate sizing block for me.
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  #5  
Old 04-02-2023, 01:29 PM
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Quote:
Originally Posted by Shade Tree Welder View Post
...I have calipers and a thread gauge, all I need; and separate tools are much more versatile. Don't waste your time...
Yeah, me too. I've been doing this long enough that I can identify imperial threads just by looking. Common metric sizes I can usually guess right but I'll normally take the time to confirm the size.

If I'm just sticking a bolt in a hole I'll usually just grab one and try it. When making new threads it's always a good idea to confirm the size--saves a lot of time if you get it right the first time.

And yes, digital calipers are the only way to go. Mine are Mitutoyo and Insize so battery life isn't an issue. I still do enough in the shop that the calipers get used almost on a daily basis--well, the 12" Mitutoyos don't get used as often now...
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  #6  
Old 04-02-2023, 01:57 PM
slip knot slip knot is offline
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https://www.boltdepot.com/Thread_detective_-_Metal.aspx

I've got a couple of these. They've saved me a lot of aggravation over the years.
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  #7  
Old 04-02-2023, 02:19 PM
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Quote:
Originally Posted by Scratch View Post
Has anyone here made one of those nut and bolt checkers before? I was thinking about making one and looking for ideas.

https://www.amazon.com/Identifier-Th...cx_mr_hp_atf_m

If you have time and want to make something, enjoy!

In my case it seems the ‘normal’ stuff isn’t an issue, it’s the non-normal stuff that I have to identify. -8 TPI series, -20 TPI series, and large acme threads (like 4-8” diameter acme) are all examples of stuff I’ve came across in the last couple years.


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  #8  
Old 04-02-2023, 03:24 PM
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Another cheaper option -

https://www.ebay.com/itm/195244049471
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  #9  
Old 04-02-2023, 04:04 PM
Scratch Scratch is offline
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I have a few calipers and a couple thread gauges in with my tap and die sets, but I have a hard time reading those thread gauges, and I don't like the idea of having to dig out two tools to find out if a bolt or nut is metric or not, plus my batteries seem to not last long in my digital calipers.

I think I like the idea of a thin, mountable plate or something, mounted right next to my bolt/nut bins. I do have the time, I really enjoy making things, (especially tools) and I've been working in the shop with my future son in law recently so I think I'll do this. I've seen the cable versions and I like those too. I also like this guys idea to make it them a little more useful.

https://www.youtube.com/watch?v=1JfkHQ44fjQ
(skip to 3:12 for his idea)

I really like the solid board idea better than the cable idea, but his idea could work on the cable or the board versions I guess.

Anyways, just looking for ideas.

Last edited by Scratch; 04-02-2023 at 04:13 PM.
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  #10  
Old 04-02-2023, 04:15 PM
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Randyjaco Randyjaco is offline
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I used to agree with what Shade said, but I came across some thread checkers at a garage sale for cheap. They are very convenient. I work with both Metric and Imperial fasteners. Sometimes on the same project
I can't differentiate similar sized metric and imperial fasteners. The thread gage is pretty useless on a small diameter female fastener. Grabbing the checkers is much easier than grabbing my calipers and thread gauge. That way I make fewer mistakes. Those mistakes will cost me more in time and materials than even the $80 thread checkers
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