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Your cart is empty.This is a top quality gauge for checking size and thread pitch of screws, bolts & nuts. Works with fractional (standard) or metric screws & bolts. fractional screw/bolt size range: (#4 to 1") metric screw/bolt size range: (3mm to 22mm) standard lengths up to 7" and metric lengths up to 180mm. fractional nuts from #6 to 5/8". Made of 1/4" thick hard very durable plastic. It's 8-3/4" long and 3-1/4" wide.
Rickydakimasu
2025-08-27 12:23:55
I hesitated to buy this thing, because while the overall review score is good, the 'Top Reviews' paint a different picture. I'm glad I bought it anyway. Wanted to respond to some of the issues other reviewers had:"Very small and there aren't any threads in the holes or the pegs that are supposed to measure nuts"If 7 inches is very small, then a lot of dudes are in trouble, myself included.It's true, the holes and pegs are not threaded. It's made of plastic, that would work maybe half a dozen times before they deformed and were no longer accurate. Instead, there is a thread gauge on the back for bolts/screws, and the pegs for nuts define thread pitch by whether or not they fit completely over it. If they can't clear the 'shoulder' of the peg halfway down, they're coarse pitch. If they can, they're fine pitch. Then just look at the conversion table printed right there on the front of the thing and boom you got your thread count. Unless you're working on NASA equipment, this will solve most any dilemma you're having with your nuts (lol)"Has no way to check the thread pitch of nuts... only their inner bore diameter."The info is right there on the unit...fit the nut to the peg, note and size and if it's coarse or fine pitch, and look at the conversion table. Metric and standard."I need one that will define what sort of thread a given bolt happens to have, e.g., how many threads per inch? "On the back side, there's a metric and US thread pitch gauges. I'm more used to using the ones at the hardware store that are set up where you actually thread it into a hole, but this tool is easier in my opinion. The way to use it is to press the bolt on top of each gauge and try giving it a little nudge to the lateral side. If it's not a match, the bolt will kinda jitter off the plastic. When you get a match, it will 'bite' the threads and won't budge. You'll know it when you hit the sweet spot, trust me. It's easier this way because once at the hardware store I accidentally used a US bolt on the metric hole and it got locked up in there. Had to flag down an employee and have him get it out using tools.Anyway, I think this gauge is pretty useful for the DIY crowd and the price is right for most of us. It's pretty bad when misleading reviews get upvotes. This one will probably get downvoted, but I hope it helps at least one person who kept scrolling down.
RT
2025-08-23 10:07:39
needed something CHEAP to measure some bolts and threads. Searched quite a bit for different options, this one had the thread count embedded, so decided on this one. I like the product except the print on the back for the threads is NOT readable. I tried to use a sharpie to make it stand out, not great but gets the job done. Would be better if it was white lettering vs. natural plastic for the thread count (like on the front). Photo 1 is the front, photo 2 is the back.
Alex L.
2025-08-14 21:31:35
Short and sweet overview: Decent product, plastic. Has a great layout that makes measuring easy. However the thread checker is hard to use. Bolt sizing is an estimate! I had a bunch of screws/bolts to measure and some were all very close in size. I ended up buying a metal threaded one that I could screw into and actually verify it's the size I'm looking for. If you're looking for a rough estimate on a screw size, this is what it is for. Otherwise, get a metal threaded one.Here's a more detailed review of the things that stuck out to me:The Good:1. Works well for what it does. Has both imperial and metric measurements but can be hard to tell the minute differences between the two sizes on similarly sized screws.The Bad/Improvements:1. Thread checker is meh. I was trying to use this alot because its really the only way to tell if an unknown screw is metric or imperial. Unfortunately the limitations of the design mean that its really hard to accurately gauge thread pitch on screws.2. Screw size is an estimate! If you have a bunch of unknown screws like I did, this makes it easy to generally classify size. Can you tell between an M8 screw and a 5/16th? There's no way to accurately tell. Can you tell if it is an M8 OR a 5/16th's? Yes defiantly.
Andy M
2025-07-29 18:54:16
Works as described amd is very durable. I carry this at work (I'm in an apprenticeship) and use it to verify correct sizes as needed until my eyes and fingers get calibrated to identifying correct sizes. I keep small zip lock baggies with this so I can get refills on screws, bolts, nuts etc. Nice tool to have.
Oregonian
2025-07-21 19:39:00
I purchased this because it had more types of measurements than similar products. The quality is excellent and it even has brief instructions right on it - great attention to detail and usability. Great value all around. I purchased a second one to give as a gift.
Samuel Santora
2025-07-07 18:35:14
Product has a number of holes and slots for measurements. Good product and it looks good.
Gary Bagnell
2025-06-16 11:29:06
worked well
J. J. Schaefer
2025-06-01 14:33:53
Nice to have
Salim
2025-03-28 16:32:23
This gage was easy to use and I am able to find the size of the bolts easily.
Martin Gutierrez Alvarez
2025-03-08 18:27:45
En mi taller de casa lo uso para identificar con facilidad tornillos
jon walker
2025-01-08 11:05:33
Simple and concise
Alx
2024-12-28 16:10:42
llegó con la medida para la rosca de 5/16" quebrada
kenneth bell
2024-11-28 13:55:52
I like the simplicity of this product. I use it for sizing nuts and bolts that require replacement.
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