Overclockers UK Forums Click here for more details
Free Shipping for Loyal Forum Members - CLICK HERE

Go Back   Overclockers UK Forums > Life > General Discussion

Reply
 
Thread Tools
Old 6th Jul 2011, 16:54   #1
MikeHunt79
Capodecina
 
MikeHunt79's Avatar
 
Joined: Jan 2004
Location: ¯\_(ツ)_/¯
Posts: 20,838
Question Where can I buy 1/4-20 UNC bolts?

I know we're supposed to be metric now, but I've got something from the US which needs '1/4-20 UNC bolts' to mount it according the the manual.

Now as I grew up in the 80's, I have no idea what 1/4-20 UNC bolts are or where to get them.

I've tried searching on Screwfix and Toolstation, but these only seem to offer the usual M3, M6, M10, etc. bolts an no imperial sized bolts.

Does anyone know where I can get some of these bolts from at all?

Thanks.


Everything in moderation. Including moderation itself.
MikeHunt79 is offline   View trust for Reply With Quote
Old 6th Jul 2011, 17:00   #2
Pudney
Mobster
 
Pudney's Avatar
 
Joined: Sep 2005
Location: Essex
Posts: 3,987
http://www.precisionscrewandbolt.com/metric.htm

M6 apparently.


Anál nathrach, orth’ bháis’s bethad, do chél dénmha
Pudney is offline   View trust for Reply With Quote
Old 6th Jul 2011, 17:01   #3
Simon
Capodecina
 
Joined: Oct 2002
Location: Berks / Moscow
Posts: 20,439
edit, nm wrong company.


XBL:RogadogUK. Zero torque but 9200rpm + 260hp
Simon is offline   View trust for Reply With Quote
Old 6th Jul 2011, 17:16   #4
MikeHunt79
Capodecina
 
MikeHunt79's Avatar
 
Joined: Jan 2004
Location: ¯\_(ツ)_/¯
Posts: 20,838
Quote:
Originally Posted by Pudney View Post
Ok, I've just tried a normal M6 bolt that I got from screwfix and it went in half a turn and then stopped. I can only a assume the usual M6 bolts are the right diameter but the wrong thread pitch?


Everything in moderation. Including moderation itself.
MikeHunt79 is offline   View trust for Reply With Quote
Old 6th Jul 2011, 17:27   #5
c@tbyte
Hitman
 
Joined: Jul 2003
Location: The Litter Tray
Posts: 598
http://www.titanbolts.co.uk/acatalog/1_4__UNC.html

Have a look. (The 20 is Threads Per Inch).

If you value your data always use QUALITY media.
c@tbyte is offline   View trust for Reply With Quote
Old 6th Jul 2011, 17:35   #6
Pudney
Mobster
 
Pudney's Avatar
 
Joined: Sep 2005
Location: Essex
Posts: 3,987
Quote:
Originally Posted by MikeHunt79 View Post
Ok, I've just tried a normal M6 bolt that I got from screwfix and it went in half a turn and then stopped. I can only a assume the usual M6 bolts are the right diameter but the wrong thread pitch?
I googled it and exhausted my knowledge on this subject. If you want help with tax I can do that

Although it would appear that the thread is the issue, I just have no idea how that works for metric bolts, screwfix doesn't seem to specify.


Anál nathrach, orth’ bháis’s bethad, do chél dénmha
Pudney is offline   View trust for Reply With Quote
Old 6th Jul 2011, 17:37   #7
TaKeN
Capodecina
 
Joined: Aug 2005
Location: Shropshire
Posts: 12,764
http://www.namrick.co.uk/acatalog/Ho..._Bolts_11.html

Take a look above.

EDIT - > This site http://www.aseriesspares.co.uk/u-n-c.../prod_322.html Has your exact size.

Last edited by TaKeN; 6th Jul 2011 at 17:44.
TaKeN is offline   View trust for Reply With Quote
Old 6th Jul 2011, 17:46   #8
PhillyDee
Capodecina
 
PhillyDee's Avatar
 
Joined: Feb 2007
Location: South Shields
Posts: 14,166
Trust me, imperial sizes are still used a lot. America uses those sizes, as do aerospace and the oil and gas industry. 1/4" is 6.35mm, and 20 is the teeth per inch (1.27mm pitch).


3 Laser cutter upto 150W and a 3D CEL Robox
PhillyDee is offline   View trust for Reply With Quote
Old 6th Jul 2011, 17:50   #9
DirtyJester
Caporegime
 
Joined: Oct 2006
Posts: 25,698
How many you need and what size and type (ie. cap head / mushroom etc etc) ?

DirtyJester is offline   View trust for Reply With Quote
Old 6th Jul 2011, 18:40   #10
MikeHunt79
Capodecina
 
MikeHunt79's Avatar
 
Joined: Jan 2004
Location: ¯\_(ツ)_/¯
Posts: 20,838
Quote:
Originally Posted by c@tbyte View Post
http://www.titanbolts.co.uk/acatalog/1_4__UNC.html

Have a look. (The 20 is Threads Per Inch).
Thanks, they are stainless too which is nice, I can't see any mention of 20 (TPI) on there however, an I right in assuming that most 1/4 UNC bolts have 20 TPI>

Quote:
Originally Posted by Pudney View Post
I googled it and exhausted my knowledge on this subject. If you want help with tax I can do that

Although it would appear that the thread is the issue, I just have no idea how that works for metric bolts, screwfix doesn't seem to specify.
I'm pretty sure normal M6 bolts that screwfix/toolstation/B&q/etc supply have a 1mm pitch, which would be around 25TPI, so that explains why my M6 bolt didn't fit!

After a little more googling it does seem that many camera tripods use the same thread, so I guess they're more common than I first thought.
Quote:
Originally Posted by TaKeN View Post
Nice, that 2nd link seems to definitely be the right size and they even specify the spanner I need also.

Quote:
Originally Posted by PhillyDee View Post
Trust me, imperial sizes are still used a lot. America uses those sizes, as do aerospace and the oil and gas industry. 1/4" is 6.35mm, and 20 is the teeth per inch (1.27mm pitch).
Gotcha, afaik normal M6 bolts are 1mm pitch so I guess that's why my bolt didn't fit.

Quote:
Originally Posted by DirtyJester View Post
How many you need and what size and type (ie. cap head / mushroom etc etc) ?
I need 6, either normal cap head or mushroom/button head, they don't need to be mega strong, as long as they can hold 10kg or so each.


Everything in moderation. Including moderation itself.
MikeHunt79 is offline   View trust for Reply With Quote
Old 6th Jul 2011, 18:51   #11
c@tbyte
Hitman
 
Joined: Jul 2003
Location: The Litter Tray
Posts: 598
Quote:
Thanks, they are stainless too which is nice, I can't see any mention of 20 (TPI) on there however, an I right in assuming that most 1/4 UNC bolts have 20 TPI>
All 1/4 UNC are 20 TPI
If you needed finer threads you'd use UNF (Unified Fine).

There are all sorts of threads:
UN Fine and Coarse
Metric Fine and Coarse
BSF, BSW, BSP, BA, etc. The list goes on.
Being in engineering I've used most of them at one time or another.

If you value your data always use QUALITY media.
c@tbyte is offline   View trust for Reply With Quote
Old 6th Jul 2011, 19:01   #12
Westyfield2
Capodecina
 
Westyfield2's Avatar
 
Joined: Dec 2005
Location: Bath
Posts: 12,507
You not got a local place you can go to? In Bath I always use Avery Knight & Bowlers Ltd (James Street West, behind Green Park Station). Haven't yet found a bolt they can't supply!

Westyfield2 is offline   View trust for Reply With Quote
Old 6th Jul 2011, 19:03   #13
MikeHunt79
Capodecina
 
MikeHunt79's Avatar
 
Joined: Jan 2004
Location: ¯\_(ツ)_/¯
Posts: 20,838
^ I do know of a few smaller (non chain) shops in and around Bristol, so now I know a little more about what I'm after I'll have to pop in and have a look.
Quote:
Originally Posted by c@tbyte View Post
All 1/4 UNC are 20 TPI
If you needed finer threads you'd use UNF (Unified Fine).

There are all sorts of threads:
UN Fine and Coarse
Metric Fine and Coarse
BSF, BSW, BSP, BA, etc. The list goes on.
Being in engineering I've used most of them at one time or another.
Ok, that makes sense, I was searching places like ebay for '1/4 UNC 20' and mainly getting things like taps and dies in my results.

After searching again for '1/4 UNC' I now have plenty of bolts to choose from, in fact item 320717773234 looks ideal, thanks.

I can see how things are far simpler if only metric threads are used, I remember talking to someone about an old motorbike that featured many different kinds of threads (Whitworth, etc.), that must have been a bit of a headache to work on.


Everything in moderation. Including moderation itself.
MikeHunt79 is offline   View trust for Reply With Quote
Old 6th Jul 2011, 19:47   #14
DirtyJester
Caporegime
 
Joined: Oct 2006
Posts: 25,698
Hi Mike I'm pretty sure I can sort you out but I'm not back to work till Sat. week.

DirtyJester is offline   View trust for Reply With Quote
Old 6th Jul 2011, 19:50   #15
PhillyDee
Capodecina
 
PhillyDee's Avatar
 
Joined: Feb 2007
Location: South Shields
Posts: 14,166
Quote:
Originally Posted by MikeHunt79 View Post
^ I do know of a few smaller (non chain) shops in and around Bristol, so now I know a little more about what I'm after I'll have to pop in and have a look.

Ok, that makes sense, I was searching places like ebay for '1/4 UNC 20' and mainly getting things like taps and dies in my results.

After searching again for '1/4 UNC' I now have plenty of bolts to choose from, in fact item 320717773234 looks ideal, thanks.

I can see how things are far simpler if only metric threads are used, I remember talking to someone about an old motorbike that featured many different kinds of threads (Whitworth, etc.), that must have been a bit of a headache to work on.
Simpler maybe, but certain threads have different uses. Though sometimes I do wonder about the people who do the designing, I work in manufacturing, and it is a lottery as to what thread they just pluck out of thin air sometimes! Nearly identical jobs can have completely different ones! Just makes it a PITA.


3 Laser cutter upto 150W and a 3D CEL Robox
PhillyDee is offline   View trust for Reply With Quote
Old 7th Jul 2011, 17:37   #16
DirtyJester
Caporegime
 
Joined: Oct 2006
Posts: 25,698
Mike sent ya message via Trust.

DirtyJester is offline   View trust for Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT. The time now is 08:31.


Powered by vBulletin®
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
© Overclockers UK (Ocuk Ltd)