Thanks for the video. Just got my thread gauge and wanted to make sure I was measuring correctly! I needed 4 SS bolts to cover some threaded holes in my garage floor, and ordered from your store. Thanks again!
Nice to learn and thank you for sharing your knowledge on these fasteners, even how to use these gauges, liking the thread type identifier on the reverse of the gauge. Lance & Patrick.
Thanks guys! I love these positive comments. The gauge is very well made. Most customers are surprised at how sturdy and durable they are. Have a great day!
Recently found out that instead of rolling the bolt over ALL the thread pitches on the back to find the correct one (I found this very hard), the chart on the front of the gauge already tells you the correct pitch for your particular size. You only need to use the back of the gauge to find out if the threads are either fine (UNF) or course (UNC). The chart on the front is the thread finder. No need to roll the bolt over ALL the pitches. Just match the chart results from the front to the 2 (fine and course) corresponding pitch sizes on the back. This then will determine for you if the threads are either fine or course.
Thanks! I’m still confused I need a 9/16 inch length bolt and 1/4 diameter How would that look written? Or written on a package, or description if ordering online?
You probably won't find a bolt that is 9/16 long. That would be considered very uncommon. Maybe someone out there offers it but I recommend getting a bolt 5/8 long and grinding/cutting it down to 9/16". (Remember that length is measured from underneath the head. Do not include the head when determining length unless the bolt has a countersunk flat style head) The written size description depends on what type of bolt or screw you have. You are using the word bolt so I'll assume that it has a machine thread. If it's standard course thread bolt then your bolt size would be written as such: 1/4-20 x 9/16. The 20 is the thread pitch (20 threads per inch). If it's a wood or sheet metal screw then the size description would be written this way: 1/4 x 9/16 or sometimes #14 x 9/16. The thread count is less important for a wood or sheet metal screw. 1/4" bolts will have either a 20 or 28 thread pitch. 20 is coarse and 28 is considered fine thread. This is important if you need to use a nut or screw it into a threaded hole. It's really a lot more simple then it seems. I hope this helps. MarineBoltSupply.com
Great question! That's exactly what this gauge is used for. Choose the hole that fits the bolt or screw perfectly and then you'll know whether it's metric or fractional. No hole on the gauge is exactly the same size. They can be close but your bolt will fit one better than the other. You can also use the thread pitch gauge on the back. If the bolt is metric it will fit the metric pitch option better than the fractional pitch option. The hole along with the thread pitch will leave no doubt to what size you have. Thanks for the question! Marine Bolt Supply
The top row in the box titled "INCH" & "MM" are the fractional (INCH) and metric (MM) screw and bolt sizes. Underneath each size are the coarse (UNC) and fine (UNF) options for thread pitch. The thread finder is on the back of the gauge. So for example the bolt size 1/4 has two thread options underneath it: 20 (coarse thread) or 28 (fine thread). The thread finder on the back will show you which one you have. Very important to know whether you have a coarse or fine threaded bolt or machine screw. Hope this helps. Thanks for the question.
Can you please tell me what the gauges to the right of 1/4" (10, 8, 6, 5, 4) correspond to? I have a self-tapping trim screw that I'm trying to identify and it fits into the number 6 hole (on the bottom row) - I'm struggling to find out what that size means.
10, 8, 6, 5 and 4 are industry standard sizes for screws that are smaller than 1/4”. Your screw is a #6 size. If your screw was 1” long than you would need a #6 x 1”. If you had a #6 machine screw that needed a nut then you would use the thread finder and see that you had a 6-32 x 1” machine screw. Hope this helps. If you have more questions about this please feel free to email me directly. sales@marineboltsupply.com Thanks!
@@cmcindustrialsupply3804 I know I'm coming here a year late. This one answers what those numbers mean. However, it doesn't answer what the actual sizes are, for example if I needed to drill a hole prior to putting a screw a #6 screw what size would that be? I've goggled those sizes, but I only get the metric for 10,8,6,5,4, but my understanding is that these are NOT the equivalent of the metric sizes.
@@fabioqa The gauge has size holes on two sides. One side is for metric sizes and the other is for machine screw sizes and fractional sizes. You need to use the #6 hole on the fractional side. Hope this helps.
@@marineboltsupply3786 Actually I was trying to find the actual sizes of the fractional side... I found the following, in case anyone was looking for similar information: Size closest fraction inch mm #4 7/64 0.11 2.8 #5 1/8 0.12 3.1 #6 9/64 0.13 3.3 #8 5/32 0.16 4.2 #10 3/16 0.19 4.8
Sure. In the box there are 3 rows titled Inch, UNC & UNF. The "Inch" row lists the different diameter sizes of a screw or bolt. The "UNC" row lists the coarse thread option for each size. The "UNF" row lists the fine thread option for each size. So for example, if you have a 1/4" bolt your two thread options are 20 (coarse thread) or 28 (fine thread). Just helps you identify the screw after you know it's size. The MM box does the same thing for metric sizes. Hope this helps. Thanks! Marineboltsupply.com
The tabs on the sides are for the nuts. You just slide it over the tab that fits. For nuts it will only measure fractional sizes. Thanks for the question.
The gauge has both options. The fractional holes and length marks are on one side and the metric are on the other. The bolt/screw will only fit into one hole correctly. That will tell you if it’s fractional or metric. It makes it easy. Thanks for the question.
Those are standard machine/sheet metal screw sizes. For sheet metal screws #4, #5, #6, #8, etc. For machine screws 4-40, 6-32, 8-32, etc. These are commonly used sizes and they are not to be confused with metric sizes like 4mm, 6mm, 8mm, etc. Hope this helps. Thanks for the question!
Definitely not a stupid question. One row is for fractional sizes and the other is for metric. No hole is exactly the same so the hole that fits your bolt or screw perfectly will tell you the size. Maybe it’s fractional, maybe it’s metric. The gauge will tell you. Thanks for the question.
It doesn't have the #12 size. #14 is the same as 1/4 so that one is there. If the screw/bolt that you are trying to measure seems to be in between the #10 and 1/4" holes and it fits the 24 thread pitch on the back you will know that it is the 12-24 size. Hope this helps. Thanks for the question.
Why would a person automatically migrate to the SAE and then to 5/16 if there are metric options available above? How do they know the difference if they don't know what kind of bolt they have? I'm surprised you didn't try it in metric holes to show the difference in fit. Sometimes it can be close.
Hi Joe. The example we showed did include a fractional bolt and not a metric bolt. The video shows that the bolt will fit snug into the correct size hole. If the bolt doesn't fit snug into any of the fractional holes then I would assume the person would try the metric side next where they would discover that the bolt is metric. Some fractional sizes are close to metric sizes but none are exact. Thanks for the question.
Thanks for the video. Just got my thread gauge and wanted to make sure I was measuring correctly! I needed 4 SS bolts to cover some threaded holes in my garage floor, and ordered from your store. Thanks again!
Again thanks!
Thanks for taking the time, I got it, very clear!
You more than answered all my questions thanks!!
Amazing description.... thank you for keeping it simple! 👍
I like how the guage has the countersunk notch on the one side.
Nice to learn and thank you for sharing your knowledge on these fasteners, even how to use these gauges, liking the thread type identifier on the reverse of the gauge. Lance & Patrick.
Thanks guys! I love these positive comments. The gauge is very well made. Most customers are surprised at how sturdy and durable they are. Have a great day!
This is an excellent video, answered all my questions, thanks so much!!
Well dang I wish I'd seen this awesome video years ago! I like how you roll! Plus I need one of those charts thingy's. Thank you!
Thanks a million. I'll need to get the model with the thread count on the back. Cool video
This was REALLY helpful. Thanks!
Thank you very much for this!
Recently found out that instead of rolling the bolt over ALL the thread pitches on the back to find the correct one (I found this very hard), the chart on the front of the gauge already tells you the correct pitch for your particular size. You only need to use the back of the gauge to find out if the threads are either fine (UNF) or course (UNC). The chart on the front is the thread finder. No need to roll the bolt over ALL the pitches. Just match the chart results from the front to the 2 (fine and course) corresponding pitch sizes on the back. This then will determine for you if the threads are either fine or course.
Great observation - Super time and error saver !!
Do you have a video on how to determine what type of nut you need for a bolt using your gauge?
I just now in Nov. 2019 had a need for a thread pitch/diameter gauge. Found this highly informative, clear, concise video. Thank You!!!
Thank you as well. :-)
Great. Thanks!
thanks great video
Very helpful, thanks
Thanks for the video. Do u have a torque chart specs for all bolts and nuts? Usa and Metric? Thanks
excellent
Thank you m8
Thanks!
I’m still confused
I need a 9/16 inch length bolt and 1/4 diameter
How would that look written? Or written on a package, or description if ordering online?
You probably won't find a bolt that is 9/16 long. That would be considered very uncommon. Maybe someone out there offers it but I recommend getting a bolt 5/8 long and grinding/cutting it down to 9/16". (Remember that length is measured from underneath the head. Do not include the head when determining length unless the bolt has a countersunk flat style head) The written size description depends on what type of bolt or screw you have. You are using the word bolt so I'll assume that it has a machine thread. If it's standard course thread bolt then your bolt size would be written as such: 1/4-20 x 9/16. The 20 is the thread pitch (20 threads per inch). If it's a wood or sheet metal screw then the size description would be written this way: 1/4 x 9/16 or sometimes #14 x 9/16. The thread count is less important for a wood or sheet metal screw. 1/4" bolts will have either a 20 or 28 thread pitch. 20 is coarse and 28 is considered fine thread. This is important if you need to use a nut or screw it into a threaded hole. It's really a lot more simple then it seems. I hope this helps.
MarineBoltSupply.com
Marine Bolt Supply k m ppp nennnnn
4:14 seems 1/16 short of 3/4 inch. Are the rounded up or down normally ?
I'm sorry but I don't understand the question. 4:14?
But how do you know if the bolt/ nut that you are trying to measure should go on the standard side or the metric side?
Great question! That's exactly what this gauge is used for. Choose the hole that fits the bolt or screw perfectly and then you'll know whether it's metric or fractional. No hole on the gauge is exactly the same size. They can be close but your bolt will fit one better than the other. You can also use the thread pitch gauge on the back. If the bolt is metric it will fit the metric pitch option better than the fractional pitch option. The hole along with the thread pitch will leave no doubt to what size you have. Thanks for the question!
Marine Bolt Supply
Thanks
What are all the numbers in the boxes above the inch ruler for?
The top row in the box titled "INCH" & "MM" are the fractional (INCH) and metric (MM) screw and bolt sizes. Underneath each size are the coarse (UNC) and fine (UNF) options for thread pitch. The thread finder is on the back of the gauge. So for example the bolt size 1/4 has two thread options underneath it: 20 (coarse thread) or 28 (fine thread). The thread finder on the back will show you which one you have. Very important to know whether you have a coarse or fine threaded bolt or machine screw. Hope this helps. Thanks for the question.
Can you please tell me what the gauges to the right of 1/4" (10, 8, 6, 5, 4) correspond to? I have a self-tapping trim screw that I'm trying to identify and it fits into the number 6 hole (on the bottom row) - I'm struggling to find out what that size means.
10, 8, 6, 5 and 4 are industry standard sizes for screws that are smaller than 1/4”. Your screw is a #6 size. If your screw was 1” long than you would need a #6 x 1”. If you had a #6 machine screw that needed a nut then you would use the thread finder and see that you had a 6-32 x 1” machine screw. Hope this helps. If you have more questions about this please feel free to email me directly. sales@marineboltsupply.com
Thanks!
@@cmcindustrialsupply3804 I know I'm coming here a year late. This one answers what those numbers mean. However, it doesn't answer what the actual sizes are, for example if I needed to drill a hole prior to putting a screw a #6 screw what size would that be? I've goggled those sizes, but I only get the metric for 10,8,6,5,4, but my understanding is that these are NOT the equivalent of the metric sizes.
@@fabioqa The gauge has size holes on two sides. One side is for metric sizes and the other is for machine screw sizes and fractional sizes. You need to use the #6 hole on the fractional side. Hope this helps.
@@marineboltsupply3786
Actually I was trying to find the actual sizes of the fractional side... I found the following, in case anyone was looking for similar information:
Size closest fraction inch mm
#4 7/64 0.11 2.8
#5 1/8 0.12 3.1
#6 9/64 0.13 3.3
#8 5/32 0.16 4.2
#10 3/16 0.19 4.8
Could you tell me what are all of the numbers that are in the grid at the bottom where it sats INCn UNCand UNF? Thanks
Sure. In the box there are 3 rows titled Inch, UNC & UNF. The "Inch" row lists the different diameter sizes of a screw or bolt. The "UNC" row lists the coarse thread option for each size. The "UNF" row lists the fine thread option for each size. So for example, if you have a 1/4" bolt your two thread options are 20 (coarse thread) or 28 (fine thread). Just helps you identify the screw after you know it's size. The MM box does the same thing for metric sizes. Hope this helps. Thanks!
Marineboltsupply.com
Oh, perfect! Thanks
How about the nuts pitch?
It would make more sense for all bolts, screws to have a small size stamp on them somewhere. Save a lot of pissing about for sure.
Ok. So how do you measure nuts with the tool and might as well show all the other nifty features of the device please.
The tabs on the sides are for the nuts. You just slide it over the tab that fits. For nuts it will only measure fractional sizes. Thanks for the question.
so how do you know if it's metric or standard?
The screw or bolt will only fit one size hole. Whichever one that is will be your size.
so how do you tell the standard (metric or un) ??
The gauge has both options. The fractional holes and length marks are on one side and the metric are on the other. The bolt/screw will only fit into one hole correctly. That will tell you if it’s fractional or metric. It makes it easy. Thanks for the question.
What about the other holes
Like the 10 12 14
Those are for metric screws and bolts (3mm through 20mm)
What about the other holes
Like the 10 8 6 5 4
below of 1/4 in inche.
Those are standard machine/sheet metal screw sizes. For sheet metal screws #4, #5, #6, #8, etc. For machine screws 4-40, 6-32, 8-32, etc. These are commonly used sizes and they are not to be confused with metric sizes like 4mm, 6mm, 8mm, etc. Hope this helps. Thanks for the question!
@@marineboltsupply3786 Thank you very much for answering, greetings!
Stupid question. I see y you have two rows of holes for diameter. How do I know what row to check with?
Definitely not a stupid question. One row is for fractional sizes and the other is for metric. No hole is exactly the same so the hole that fits your bolt or screw perfectly will tell you the size. Maybe it’s fractional, maybe it’s metric. The gauge will tell you. Thanks for the question.
How much sir?
What do you call that gadget?
It's a nut & bolt gauge. For checking size and thread pitch.
Marine Bolt Supply thank you
Skip to 2:27 to find out how to use it.
Is 10mm close too 5/16th ??
5/16" = 7.937mm and 3/8" = 9.525mm 3/8 is closer.
Actually 5/16 is closer to 8 mm than 3/8 it's closer to anything, no?
How about a #12 or #14 screw not metric? It only goes to #10.
It doesn't have the #12 size. #14 is the same as 1/4 so that one is there. If the screw/bolt that you are trying to measure seems to be in between the #10 and 1/4" holes and it fits the 24 thread pitch on the back you will know that it is the 12-24 size. Hope this helps. Thanks for the question.
What about bolts?
you did not show the nut measurement
i just purchased one, but you don't show how to measure the nuts?????
The tabs on each side of the gauge are for the nuts. Simply push the nut over the tab and you've got the size. Hope this helps.
Why would a person automatically migrate to the SAE and then to 5/16 if there are metric options available above? How do they know the difference if they don't know what kind of bolt they have? I'm surprised you didn't try it in metric holes to show the difference in fit. Sometimes it can be close.
Hi Joe. The example we showed did include a fractional bolt and not a metric bolt. The video shows that the bolt will fit snug into the correct size hole. If the bolt doesn't fit snug into any of the fractional holes then I would assume the person would try the metric side next where they would discover that the bolt is metric. Some fractional sizes are close to metric sizes but none are exact. Thanks for the question.
i think some of the bolts are metric because they are too much loose in the imperial holes that you have used...
You forgot to do the nuts.
IM HIS SON