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Whitworth/ UNC Screws

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Whitworth/ UNC Screws
Zetomagneto Offline
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#1
31-07-2018, 08:07 PM
I am hoping someone can help, I am looking for some raised head countersunk screws size no 12 x 24
UNC or 7/32” Whitworth.
An internet search was fruitless, these are an obsolete size, just hoping someone may have some, well 10 actually please.
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stuartu Offline
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#2
31-07-2018, 08:52 PM
Slotted? How long? Westfield Fasteners list a Phillips headed version in lengths up to 1" here:

www.westfieldfasteners.co.uk/A2_ScrewBolt_PhilRaCsk_UNCoarse_0.2160.html

Regards,
Stuart
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Zetomagneto Offline
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#3
31-07-2018, 09:55 PM
(31-07-2018, 08:52 PM)stuartu Wrote: Slotted? How long? Westfield Fasteners list a Phillips headed version in lengths up to 1" here:

www.westfieldfasteners.co.uk/A2_ScrewBolt_PhilRaCsk_UNCoarse_0.2160.html

Regards,
Stuart
Thanks Stuart, I have seen those but don’t want Philips screws on my seven.
I could get some and have them tig welded and recut a slot.I may just have to put up
with them thanks anyway
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bob46320 Offline
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#4
31-07-2018, 10:16 PM (This post was last modified: 31-07-2018, 10:23 PM by bob46320.)
7/32 is 5.556 mm 0BA is 6mm and as the Austin wasn't metric I would hazard a guess that you should look for 0BA
This site shows 3/16 BSF http://www.stainlessautomotivefastenings...ts_id=8824

Also 0BA raised countersunk
https://www.stainlessautomotivefastening...rtbd37r4j6
You can identify a 12-24 screw by measuring the diameter with a ruler at slightly less than 7/32″ (slightly larger than 3/16″ or 0.210″).
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Phil Kingdom Offline
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#5
01-08-2018, 12:23 AM
You could always re-thread a M6 to 7/32 Whit, I just tried it on a mild steel bolt as a test and the thread came out OK.
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Zetomagneto Offline
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#6
01-08-2018, 08:58 AM (This post was last modified: 01-08-2018, 08:59 AM by Zetomagneto.)
(31-07-2018, 10:16 PM)bob46320 Wrote: 7/32 is 5.556 mm  0BA is 6mm  and as the Austin wasn't metric I would hazard a guess that you should look for 0BA
 This site shows 3/16 BSF    http://www.stainlessautomotivefastenings...ts_id=8824

Also 0BA raised countersunk
https://www.stainlessautomotivefastening...rtbd37r4j6
You can identify a 12-24 screw by measuring the diameter with a ruler at slightly less than 7/32″ (slightly larger than 3/16″ or 0.210″).

Hi Bob,0BA is close to 1/4” and too big, 3/16 is too small, 1/32” undersize.
Thanks for suggestions.
(01-08-2018, 12:23 AM)Phil Kingdom Wrote: You could always re-thread a M6 to 7/32 Whit, I just tried it on a mild steel bolt as a test and the thread came out OK.

Thanks Phil, sounds like a plan,will try that
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