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Nuts & Bolts

Nuts & Bolts is a simple application to look up screw sizes. It provides screw diameters, screw head dimensions, tap drill sizes, and clearance holes for standard sizes #0 to 1" and metric sizes M1.4 to M24. A simple interface allows you to cycle through sizes and screw types OR tap any dimension to quickly jump to the size you want.
Free version includes dimensions for screw diameters, tap drill sizes, clearance holes for all standard and metric sizes as well as screw head dimensions for pan and button head screws.

Get the PRO version and unlock screw head dimentions for:
* Socket Head Cap Screw
* Round
* Flat
* Hex
* Binder
* Fillister
* Truss

Category : Tools

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Reviews (29)

ube. m. Feb 3, 2022     

If all you need is the most basic info - clearance, tap, drill, etc - for screws, this is the app. Don't know about any update (should, just to make the warning go away), but it seems to run fine; I mean, it isn't like the screws *mutated*, or anything. I'm fine with it, and thank the author for the time &trouble. Update, and I'll spring for the Pro license.

Gre. C. Mar 7, 2020     

Hopes were high but upon opening it said app was developed for an earlier android version and may not work properly. Minimal valuable data in the free app but can't justify purchase if it's not current. Latest update appears to be 2012? App should be removed from playstore.

Roy. T. May 16, 2022     

Just updated, and now it immediately crashes, saying "There was an error reading screw sizes". Removed it and re-installed, same behavior. Uninstalling...

Tah. May 3, 2019     

Need to update more metric and inches sizes pitch calculation. Kindly update it. Otherwise the app is good.

Tim. P. Dec 17, 2019     

The best and clear display info for user.

ste. p. Sep 11, 2019     

Nuts & Bolts are fun!

Nat. V. Jul 4, 2021     

Not Worth the download

Har. D. Apr 25, 2021     

BOLTS & šŸš¤šŸ›„ļø & šŸ”© but, šŸš«āš™ļøsā‰ļø No NUTS. CHANGE NAME TO BOLTS flathead BOLTS.

dvi. Dec 8, 2013     

If I wanted, I could make my own bolt with a 3" thick head, with a 12" diametre. Don't know why I ever would, but it just goes to show the uselessness of those dimensions. Also, there are far more kinds of bolts than that, which makes the pro-version seem limited(didn't buy it, so I could be wrong).

Aks. G. Oct 5, 2014     

Does not cover details about machine hexagonal head nuts and bolt rarely shows two to three types of bolt.....

Gle. N. Jul 12, 2014     

Missing metric fine threads and only allows standard thread sizes. I often make odd thread pitch fasteners so setting the pitch and diameters independently would be handy.

Dou. A. Aug 4, 2014     

It is a good app n simple for old timers to use. But no measures on nuts. Was looking for measurements tip to tip on bolt. Im wanting to make a nuts n bolts checker. Need to know what size hole to hold the nut in place.

Fer. F. Apr 2, 2018     

do you can add this app to apple App Store ? I change my phone from an android to a iPhone and can't be able to download from the App Store. Is very useful and I used every day. please added to the App Store

Bea. H. Nov 8, 2013     

You need pro not much here.

Ner. R. Jul 31, 2015     

Nuts &bolts awesome

emm. s. Oct 19, 2017     

Please add on apple store

A. G. u. Oct 8, 2011     

Missing M2.5, M5 , M7 etc and several of the finer pitch metric sizes at M10, M12 and M14 etc. Would buy the Pro version if I felt confident it had comprehensive sizing.

A. G. u. Apr 6, 2011     

Not a bad start. The UNC & UNF headings are displaced on my HTC Wildfire. Please add AN bolts & spanner sizes.

A. G. u. Feb 27, 2012     

How can you do anything with this app when you get 2bolts that's it!!!

A. G. u. Mar 3, 2012     

My initial few minutes of looking around in the app, but looks great!

A. G. u. Mar 18, 2011     

Free one is to limited and is worthless, pro isn't worth the cost

A. G. u. Mar 14, 2011     

Great app - very useful for machine design! The pro version is even better!

A. G. u. Sep 7, 2012     

But a tolerance dimension for certain dimensions would be nice. For instance, the head diameter on a 1/4" SHCS is closer to 0.370", and is marked as 0.375" maybe tap on the dimension to get a more detailed view? Thanks.

A. G. u. Jul 13, 2011     

So handy at work. Just wish it had pipe thread also.

A. G. u. Mar 24, 2012     

Only suggestion would be to add screw clearances

A. G. u. Jun 12, 2012     

Nice and simple.

Gre. M. Jan 26, 2013     

Needs to be a lot more obvioud that this is a crippled version of the app

Phr. 4. Dec 17, 2017     

Free app thats trying to get you to buy the pro version and has no nut sizing.

Dan. R. Jan 14, 2017     

If you are with experience in mechanics it's really helpful!!!!