How to Measure Bolts, Nuts and Screws Using a Thread Gauge Size Tool
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- เผยแพร่เมื่อ 7 ต.ค. 2020
- An in-depth tutorial on how to use a bolt gauge sizing tool. This tool will help you identify the Diameter, Thread Pitch, and Length , which are the 3 main dimensions to size a fastener. Purchase Our Gauge Here: www.boltsandnuts.com/shop/bol...
Thread Pitch Printable Cheat Sheet:
www.boltsandnuts.com/user/fil...
Thanks! After decades as a DIYer, I learned something new here; namely, that the fastener length is "whatever goes into the hole". So, for flat-head machine screws, the official way is to measure the *whole* length. Not a big deal if you're taking a sample screw to the store to match, but is important if you're ordering without a screw to match.
It's 5am here and I've been trying to catch up on my drone setup videos when I came across this. Very informative and well-explained! Your effort is much appreciated.
Thank you! I do the research and put in the time to make these videos as informative as possible!!
Very helpful, had a gauge for sometime but never really knew how to use it till now!
Right! They’re super useful and most people don’t know how to use the whole thing! Glad you found our video!! Thanks for the comment!
Thank you and have a blessed day.
Very hand tool. Cleverly and concisely designed, also great concise presentation as well. Edit: Oops, meant to write "handy tool" but I guess my meaning came through. Thanks much.
Hey awesome, I’m glad you found this helpful! We try our best to make our videos clear and concise.
Thank you for the printable table, lost mine last week.
After wasting time on google searching for the answer w no luck this was just what I needed, THX!!!
Great explanation of all the functions available, better than other videos. 👍
Glad it was helpful! Thank you for watching!
Would it kill you to do at least ONE metric example?
lol
awesome video, just what i need. Great step by step instructions. Thank you!! will be buying a few of these for each tool box. Invaluable knowledge
Just ordered one, I was looking up reviews for this tool and your video came up, love the information and demonstration.
Thank you, that really means a lot. I’m glad we could help!!
Well done video . Learned a lot of things I didn't know but always wanted to.
Thanks.
Thank you!!
This is really cool, it will come in handy for future projects!
Great video Andy! Thank you
Thanks for explaining the use of that nifty tool! Very useful!
Hi Nick, I’m glad you found it helpful! Thank you for watching!!
Thanks for the lesson. Nice, clear and to the point.
Just bought your tool on Amazon. Thank you. Can't wait to use it.
Thank you!
Great video. Demonstrations were easy to follow.
Excellent presentation! Now I know how to use this tool! Thanks so much!
You checked the thread pitch wrong. The ridges are above the labels, but you tested the ones below. For example, at 3:29 you say "I'm going to come over to the 13 and try that", but you use the ridges _below_ the 13. The ridges for 13 thread pitch are actually above the "13" label. At 5:28 you say 18 but are actually on 20.
Extremely helpful and direct. Thank you for this.
Hello Mike how are you doing today. Hope you have a nice weekend 😊
Nice! I often go to the hardware store and eye balling things. Now I'll be more prepared, thanks. 😉
Glad you found this video! Sounds like you’ll be saving time and money! Let us know if we can be of further assistance. Sincerely, Andy
@@BoltsandNutscom Thank you!
Thanks for all you do.
Alex, thank you for watching!!!
Great information absolutely enjoyed it! Thanks!
Excellent tool and presentation, thanks!
That was extremely informative and useful. Thank you.
Thank you, very well presented.
Hi Malcolm - thank you so much, that really means a lot. I’m glad you found this helpful! - Andy
I've just bought one of these, so this video gives me much joy
Awesome glad this helped! Thank you for watching!!
name of the product?
Excellent. Thank you
Super useful, thank you!
Yes! Thank you, I have a lot of fasteners I need to measure.
Now I understand! Easy! Thanks.
Great video!!
This whole time i would screw it in thinking that we the fit. I need this gauge. Awesome vid!
😬thank you!
Well done presentation. I liked it a lot.
Cordially,
RE Morgan
Decatur, GA
Thank you very much!!
this was very helpful, thanks
Awesome glad this helped! Thank you for watching!!
Thank You !
This is awesome. Thanks I’ll be buying a few gauges.
Awesome thank you for watching!
great video 👌
Excellent ! TY.
Good video and gauge. Also, it might help to use the correct thread pitch when confirming whether or not the bolt is fine or coarse.
thanks for the video. helped a lot
Awesome glad this helped! Thank you for watching!!
Ty you thaught me something i wondered about and you taught me how to use the guage
Awesome Keith, I’m glad it helped! Thanks! Andy
very good video
Thank you awesome information
No problem, thank you for watching!
You guys need too sponsor Jimmy oakes he is in desperate need of your expertise from little Chris in the UK
Thank you.
Good video! . When i seen your video went purchase one of these good to have around.
Hi JP the Z, can you tell me more about your issue when trying to figure out the size? I might be able to help further. Thanks Andy
@@BoltsandNutscom Of course when using the thread pitch for either metric or inch cannot fine one with the correct groove
Thank you
Thank you I need to buy one of these
Awesome! Thank you for watching!
Thanks
Nice tool.
Glad it was helpful! Thank you for watching!
Thank you very usefull !!!
Awesome I’m glad you found this useful!! Thanks for watching!!
Thanks, just got one of these tools myself, and I wasn't sure if the bolt diameter was "the hole it fits in snugly" or "the one it no longer fits in" because of the threads themselves.
Hot Damn! That's awesome. Sold!
Learning about markings on bolt heads goes a long ways also. If you see three or 6 lines evenly spaced in a radial pattern on the bolt head that's an sae grade 5 or grade 8 respectively. Graded metric bolts will have 5.8, 8.8, 10.9 or 12.9 stamped on the head. On a flathead screw the angle of the countersink is also an indicator. 90 deg is metric and 82 deg is SAE.
Totally agree! You know your stuff!!
Thanks for that info. Definitely added to my knowledge base. I'm 68 and always welcome learning something new.
Could you also make a video about how to measure drill bit sizes?
Yes, great idea!
cool!!
Hi,
Thank you for your video.
I bought a ruler very similar to this one (seems exactly the same one, but I bought it elsewhere without a logo).
1. In your pdf file inch table, what units are the 0 to 10 in the bolt diameter (it can’t be multiples of inch, the holes in the red ruler 4 to 10 in the inch line are way too small for that) ?
2. In the ruler I have, the size of the metric holes don't fit what it says. For example, the hole 12mm measures 11.5mm (used my caliper), 22mm measures 21.5. I was wondering if yours measures the same ?
3. Is this ruler also good for wood screws ?
GOOD VIDEO
Thank you!
Very good presentation. Thanks for sharing
Hi Elijah, thank you for the compliment and watching!
HOWdy B&N, ...
Thanks ...
COOP
the WiSeNhEiMeR from Richmond, INDIANA
...
I have a graphite part with 3/16 holes in it- what diameter bolt might fit well?
Good tool. metric bolts have a number on the head. 4.6 8.8 10.9 12.9 that indicates the material properties. (See google)
what about socket head cap screws aka allen bolts how are those measured
What size nut driver will I need for the 1/2 bolt to fasten?
Hi, a standard 1/2” diameter hex nut will require a 3/4” wrench size. (That can vary if you are using a different style nut.). I hope that helps, thank you for you inquiry!
What size screw fits into the standard 5?
I'm looking to size some small screws for a guitar. Will this product work for that? Thanks in advance.
Hi, I believe guitar screws are very tiny. This may not be good for something that small.
What if you pick up a metric nut, will it confuse someone to think that it might be imperial after using the gauge?
Metric nuts have a different diameter, so they will not fit or be loose. They may also have a Metric grade mark, to help initially. I do agree with what you are saying though- anything is possible.
Where can I get a gauge in the UK.
How about metric M8-1.25, how many thread?
Hi Sunshine, M8-1.25 is the diameter and pitch. The last thing you would be looking for is length. I hope that helps, if not please reach out so we can assist you further. Sincerely, Andy
Thank you ! I just got one of these off Amazon and everything written on the package wasn't English and on a good day I can barely speak that
from where available ? and price ?
Seems to be out of stock. Would love to pick up a few templates. When you guys restocking?
This is a serious question but how did you become “certified” is there a course you can take?
Yep! @andytheboltguy is certified by the Fastener Training Institute!
Okay nuts and bolts experts, a question from a novice house maintainer. My mower has a countersunk hex bolt and I need to go buy a tool to take it out to clean underneath. How do I know what size driver to buy? I can't take it out to measure it, as I have no tool to do so.
Sounds like you are looking for a set of hex keys or allen wrenches. They generally come in a set, hopefully one of those is them. You might also be able to check with the manufacturer. I hope that helps!
@@BoltsandNutscom Thanks. Did exactly that, got a Kobalt set, worked well. Have a good day.
Is this tool a must have for bike mechanics? I would like to gift this to someone
Absolutely!
GOOD
Thank you
@@BoltsandNutscom Hi! Great video. I think @3.23 you are checking 24 tread... Regards
What if I need to measure a threaded hole from a second hand dresser?
I used drill bits for that. I use the one that slides in fairly good fit, then hold it up against screws, to pick out one that the spiral is just a bit larger than the width of the drill bit.
what if you have an uncommon tpi
A 10mm bolt needs a 10mm wrench.
What size wrench is needed for a 3/8 bolt?
That is a nice gauge,
Hi Frank, a 10mm bolt wrench size can very between the different types. Generally when someone says a 10mm bolt, they are referring to the thread diameter and not the wrench size. If you let me know exactly what bolt you are looking at, I can look into it further. Thanks for watching and your comment!
@@BoltsandNutscom Thank you for your response and informative video. What I am irked about is we still having to purchase two different sets of socket, wrenches, impact sockets and so on. I think I am finally understanding part of my confusion. When I say the bolt is 3/8, the shaft diameter is 3/8, but the head of the bolt and wrench required is 9/16, one size larger. Thanks again for helping me and others get a handle on this. peace
So what would have happened if it was a metric nut? I suppose it would be slightly loose. Not great though
I don’t recommend measuring metric nuts with this gauge, it only measured inch nuts. If you have a matching metric bolt you can figure the pitch and diameter, and then run the nut on the bolt. That my little work around for that. Let me know if I can be of further assistance. Thanks for watching!
Metric is so much easier.
You should have mentioned “Grade” also.
We will have a separate video for grades. This was more-so how to measure. Thank you for watching!
Odd that your gauge says "USA thread pitch". Imperial isn't 'merican :) ..also, all new American cars (and most everything technical) are all built using Metric! Cool tool BTW!
Likely due to the Euro owners of "American car" companies.
American fastener standards are all written in inch measurements. (IFI, SAE, ASTM, etc). Thread pitch for imperial standards are measured in TPI or threads per inch which come from American standards. These gauges measure USA thread pitches & Metric for non American fastener standards (DIN, JIS, Etc). Most nations have their own standards concerning fastener dimensions.
And I’ve been measuring the size of my nuts the wrong way all this time.
Awesome glad this helped! Thank you for watching!! 😂
My car has a lot of 13 mm bolts.
little one then little bigger then little more bigger then off to the hardware store cause never have the right one or the washer
Not a ruler! It is a scale.
Why are you when talking you moving your hane
Blessings, John 3:16. Jesus loves you.
You don't include the threads portion of the bolt in your length. Only the shank (grip length). The grip length will change with every bolt size. A 6" bolt will have the same amount of threads as a 9" bolt but the 9" bolt will have a longer grip length. The grip length (shank) is the portion of the bolt that is the same thickness of whatever material you are bolting. Bad video.
Lost me on the nuts..When you are teaching something that's obvious to you, you MUST appreciate it's not obvious to someone else..Ever taught someone to drive?
Paul, you may have skipped over where I explain the nuts. It’s at the end of the video. I mention it in the beginning, but explain it in the end. Thanks for watching. Andy
What are those products which still use standard threaded bolts? Are you repairing very old machinery? Stop perpetuating a stupid system!
Thank you