Ga

GarageWoodworks

16/08/2012 10:26 AM

"Coarse" vs "Deep" threads

Ok - Potentially silly question. McFeeleys sells screws that are either
Deep thread or Coarse or Fine. What is the difference between a "deep"
vs "coarse" thread? Applications differences? All of the ones I have
bought are "deep" threads and I have been very happy with them. I have
some "deep" thread and "fine" thread Kreg pocket screws and both work
well in hardwoods that I have used to date with no noticeable difference.


This topic has 8 replies

LJ

Larry Jaques

in reply to GarageWoodworks on 16/08/2012 10:26 AM

16/08/2012 10:24 PM

On Thu, 16 Aug 2012 10:26:31 -0400, GarageWoodworks <[email protected]> wrote:

>Ok - Potentially silly question. McFeeleys sells screws that are either
>Deep thread or Coarse or Fine. What is the difference between a "deep"
>vs "coarse" thread? Applications differences? All of the ones I have
>bought are "deep" threads and I have been very happy with them. I have
>some "deep" thread and "fine" thread Kreg pocket screws and both work
>well in hardwoods that I have used to date with no noticeable difference.

Screws made specifically for termite barf are usually deeper in
thread, Brian.

--
All of us want to do well. But if we do not do
good, too, then doing well will never be enough.
-- Anna Quindlen

Ga

GarageWoodworks

in reply to GarageWoodworks on 16/08/2012 10:26 AM

16/08/2012 11:14 AM

On 8/16/2012 10:26 AM, GarageWoodworks wrote:
> Ok - Potentially silly question. McFeeleys sells screws that are either
> Deep thread or Coarse or Fine. What is the difference between a "deep"
> vs "coarse" thread? Applications differences? All of the ones I have
> bought are "deep" threads and I have been very happy with them. I have
> some "deep" thread and "fine" thread Kreg pocket screws and both work
> well in hardwoods that I have used to date with no noticeable difference.


Ok. It looks like "deep" and "coarse" are the same thread type.

Ga

GarageWoodworks

in reply to GarageWoodworks on 16/08/2012 10:26 AM

16/08/2012 11:40 AM

On 8/16/2012 11:23 AM, -MIKE- wrote:
> On 8/16/12 10:14 AM, GarageWoodworks wrote:
>> On 8/16/2012 10:26 AM, GarageWoodworks wrote:
>>> Ok - Potentially silly question. McFeeleys sells screws that are either
>>> Deep thread or Coarse or Fine. What is the difference between a "deep"
>>> vs "coarse" thread? Applications differences? All of the ones I have
>>> bought are "deep" threads and I have been very happy with them. I have
>>> some "deep" thread and "fine" thread Kreg pocket screws and both work
>>> well in hardwoods that I have used to date with no noticeable
>>> difference.
>>
>>
>> Ok. It looks like "deep" and "coarse" are the same thread type.
>
>
> I thought "deep" had a reduced shank diameter. Overall diameter the the
> threads are the same, but because the shank is narrower, the threads are
> deeper. Make sense?

Makes sense. How does 'deep' differ from 'coarse'? It's funny, I have
around four FWW articles on screws and they all gloss over thread types.


>

Ga

GarageWoodworks

in reply to GarageWoodworks on 16/08/2012 10:26 AM

16/08/2012 11:42 AM

On 8/16/2012 11:40 AM, GarageWoodworks wrote:
> On 8/16/2012 11:23 AM, -MIKE- wrote:
>> On 8/16/12 10:14 AM, GarageWoodworks wrote:
>>> On 8/16/2012 10:26 AM, GarageWoodworks wrote:
>>>> Ok - Potentially silly question. McFeeleys sells screws that are
>>>> either
>>>> Deep thread or Coarse or Fine. What is the difference between a "deep"
>>>> vs "coarse" thread? Applications differences? All of the ones I have
>>>> bought are "deep" threads and I have been very happy with them. I have
>>>> some "deep" thread and "fine" thread Kreg pocket screws and both work
>>>> well in hardwoods that I have used to date with no noticeable
>>>> difference.
>>>
>>>
>>> Ok. It looks like "deep" and "coarse" are the same thread type.
>>
>>
>> I thought "deep" had a reduced shank diameter. Overall diameter the the
>> threads are the same, but because the shank is narrower, the threads are
>> deeper. Make sense?
>
> Makes sense. How does 'deep' differ from 'coarse'? It's funny, I have
> around four FWW articles on screws and they all gloss over thread types.

(duh) Scratch that. I'm still half asleep. I got it.


>
>>
>

Mm

-MIKE-

in reply to GarageWoodworks on 16/08/2012 10:26 AM

16/08/2012 10:23 AM

On 8/16/12 10:14 AM, GarageWoodworks wrote:
> On 8/16/2012 10:26 AM, GarageWoodworks wrote:
>> Ok - Potentially silly question. McFeeleys sells screws that are either
>> Deep thread or Coarse or Fine. What is the difference between a "deep"
>> vs "coarse" thread? Applications differences? All of the ones I have
>> bought are "deep" threads and I have been very happy with them. I have
>> some "deep" thread and "fine" thread Kreg pocket screws and both work
>> well in hardwoods that I have used to date with no noticeable difference.
>
>
> Ok. It looks like "deep" and "coarse" are the same thread type.


I thought "deep" had a reduced shank diameter. Overall diameter the the
threads are the same, but because the shank is narrower, the threads are
deeper. Make sense?


--

-MIKE-

"Playing is not something I do at night, it's my function in life"
--Elvin Jones (1927-2004)
--
http://mikedrums.com
[email protected]
---remove "DOT" ^^^^ to reply

CH

"Cliff H"

in reply to GarageWoodworks on 16/08/2012 10:26 AM

16/08/2012 10:26 PM

> Applications differences?

I do know that for certain applications like screwing in the sides of say
particle board you need a certain kind of screw.

My own definition

Coarse vs fine is the threads per inch. Deep threads are the differnce
between the the outer diameter and the root of the screw.

lL

[email protected] (Larry W)

in reply to GarageWoodworks on 16/08/2012 10:26 AM

17/08/2012 11:06 PM

In article <[email protected]>,
GarageWoodworks <[email protected]> wrote:
>Ok - Potentially silly question. McFeeleys sells screws that are either
>Deep thread or Coarse or Fine. What is the difference between a "deep"
>vs "coarse" thread? Applications differences? All of the ones I have
>bought are "deep" threads and I have been very happy with them. I have
>some "deep" thread and "fine" thread Kreg pocket screws and both work
>well in hardwoods that I have used to date with no noticeable difference.

Not sure what distinction McFeeley's is trying to make, but generally,
"coarse" and "fine" in relation to screw or bolt threads has to do with
thread count per inch (or put another way, thread pitch.). "Deep" of
course would refer to the depth of the threads, peak to root or valley. So
it would be very possible for instance to have a coarse thread that is
shallow, or a fine thread that is deep.


--
Make it as simple as possible, but not simpler. (Albert Einstein)

Larry Wasserman - Baltimore Maryland - lwasserm(a)sdf. lonestar. org

Jj

Jack

in reply to GarageWoodworks on 16/08/2012 10:26 AM

21/08/2012 11:41 AM

On 8/16/2012 10:26 AM, GarageWoodworks wrote:
> Ok - Potentially silly question. McFeeleys sells screws that are either
> Deep thread or Coarse or Fine. What is the difference between a "deep"
> vs "coarse" thread? Applications differences? All of the ones I have
> bought are "deep" threads and I have been very happy with them. I have
> some "deep" thread and "fine" thread Kreg pocket screws and both work
> well in hardwoods that I have used to date with no noticeable difference.

I think Larry got it right, but I also think coarse threads are
generally both coarse and deep, and fine threads generally fine and
shallow, but I guess it doesn't have to be that way.

I like coarse/deep threads all the time. Fine/shallow threads are shaky
in soft woods like pine, but coarse works in both, so I buy only
coarse/deep.

--
Jack
Add Life to your Days not Days to your Life.
http://jbstein.com


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