How many screws in a 1lb

[poolhound]

I am running low on some of my common screws and was going to stock up again. I generally use a combination of Normal wood screws and drywall screws.

I was thinking that I may just place a larger order at McFeelys but as I was comparing prices for example for HD drywall vs Mcfeelys wood screws I realized that the standard drywall screws at HD are sold by the pound.

So - how many screws in a pound?

Yes it does depend on how long, so lets say 1 1/2"

Also anybody buy screws elsewhere?

[pelligrini]

About 16 ounces worth...

I bet somebody will ask what size.

[LarryG]

Never counted but I'd guess somewhere around 200 screws in a standard 1lb box for the 1-5/8" size, which is the closest to your 1-1/2" example that I use.

That's one reason I've started ordering my screws from McFeely's -- you get a fixed quantity, which makes estimating easier. Better screws, too (I use the square drives).

[LCHIEN]

Found this in a contractor thread...

1 lb Box. Size 6x1-1/4" Quantity per box 256

1 lb Box. Size 6x1-5/8" Quantity per box 208

1 lb Box. Size 8x3" Quantity per box 83
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Last edited by Leo G; 06-25-2008 at 09:09 PM.

06-25-2008, 09:12 PM #6 mickeyco
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* 1-5/8" x #6
* Bugle Head, #2 Phillips Drive
* Black, Coarse Thread, Sharp Point
* 25lb Clear Resealable Bucket with Handle
* Approximately 200 per pound

200 x 25 = 5000


Link 1

* 1-1/4" x #6
* Bugle Head, #2 Phillips Drive
* Black, FINE Thread, Sharp Point
* 25lb Clear Resealable Bucket with Handle
* Approximately 258 per pound

[poolhound]

Thanks Loring, I did search around but couldnt find anything that definitive.

[LCHIEN]

Thanks Loring, I did search around but couldnt find anything that definitive.

#6x1.25 258/pound
#6x1.625 200/pound
#6x2 175/pound

#8x2.5 119/pound
#8x3 83/pound

from amazon listings of 25-pound bucket drywall screws

[LCHIEN]

I would not trust the figures I gave you.
If you convert it to oz/screw and plot it and run a regression you would expect one line for #6 and one line with a steeper slope (in oz per inch) for #8 screws, since the #8 would be nearly twice as heavy per inch being probably 1.5 times as thick in the body of the shank.

the wequation of the weight for this kind of screw (constant shank)
would be expected to be:

Wt (screw) = weight of head + weight per inch x # inches.

The Y-intercept should be basically the weight of the head of the screw.
Assuming the #6 screw dat is correct This tells me the #6 screw head alone is .013 oz and the shank is .04 oz per inch.

But the #8 data shows a largish negative intercept. the slope is 3x larger but the intercept can't be negative.

So all this data is suspect, maybe the #6 data is correct, at least its in an expected line, the #8 data only has 2 points.

**** engineers have to analyze everything.

here's the grip-right web page
http://www.grip-rite.com/fasteners.asp
their downloadable PDF catalog has listings of the count of screws per pound for drywall and specialty outdoor screws.

[ragswl4]

Also anybody buy screws elsewhere?

McFeely's for me.

[poolhound]

I would not trust the figures I gave you.
If you convert it to oz/screw and plot it and run a regression you would expect one line for #6 and one line with a steeper slope (in oz per inch) for #8 screws, since the #8 would be nearly twice as heavy per inch being probably 1.5 times as thick in the body of the shank.

the wequation of the weight for this kind of screw (constant shank)
would be expected to be:

Wt (screw) = weight of head + weight per inch x # inches.

The Y-intercept should be basically the weight of the head of the screw.
Assuming the #6 screw dat is correct This tells me the #6 screw head alone is .013 oz and the shank is .04 oz per inch.

But the #8 data shows a largish negative intercept. the slope is 3x larger but the intercept can't be negative.

So all this data is suspect, maybe the #6 data is correct, at least its in an expected line, the #8 data only has 2 points.

**** engineers have to analyze everything.

here's the grip-right web page
http://www.grip-rite.com/fasteners.asp
their downloadable PDF catalog has listings of the count of screws per pound for drywall and specialty outdoor screws.

Loring - As you say only an engineer would decide to take it this far (and I am one too).

Very interesting data and thanks but at this point I was only looking for a ROM

However if you wanted to take this further you might head down to HD and pick up a statistically significant number of boxes of screws and conduct some sample testing. You could calculate a good numbr of standard deviations not only on # per 1lb but also the undoubted variation in the weight of each screw and how much over/under 1lb each box really is....

The posibilities are endless

[Sparky2002]

I would not trust the figures I gave you.
If you convert it to oz/screw and plot it and run a regression you would expect one line for #6 and one line with a steeper slope (in oz per inch) for #8 screws, since the #8 would be nearly twice as heavy per inch being probably 1.5 times as thick in the body of the shank.

the wequation of the weight for this kind of screw (constant shank)
would be expected to be:

Wt (screw) = weight of head + weight per inch x # inches.

The Y-intercept should be basically the weight of the head of the screw.
Assuming the #6 screw dat is correct This tells me the #6 screw head alone is .013 oz and the shank is .04 oz per inch.

But the #8 data shows a largish negative intercept. the slope is 3x larger but the intercept can't be negative.

So all this data is suspect, maybe the #6 data is correct, at least its in an expected line, the #8 data only has 2 points.

**** engineers have to analyze everything.

here's the grip-right web page
http://www.grip-rite.com/fasteners.asp
their downloadable PDF catalog has listings of the count of screws per pound for drywall and specialty outdoor screws.

Loring,

As an electrical engineer who loves excel spreadsheets, I had to chuckle when I saw yours. Good thinking with the analysis.

Shawn

[LCHIEN]

Loring,

As an electrical engineer who loves excel spreadsheets, I had to chuckle when I saw yours. Good thinking with the analysis.

Shawn

Thanks, Shawn, I appreciate your comment. After I wrote it i almost didn't post it, i looked at it and thought, god, who's going to read and understand that!

My thoughts on seeing a bunch of numbers is, always, is there a quick way I can check for sanity here? How can I see if this guy is blowing smoke...

[poolhound]

Loring,

As an electrical engineer who loves excel spreadsheets, I had to chuckle when I saw yours. Good thinking with the analysis.

Shawn

I spend a good part of my week with Excel although these days I use it for business modeling rather than engineering calculations.