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Old 20th October 2020, 14:22   #1
macafee2
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Default Could you ever buy

Could you ever buy 9/32 or 7mm countersunk machine screws?
looking at the internet I cant find either.

If you know where I could get 3 with nuts, self locking preferably, please do tell.

6mm is a bit sloppy in the hole, 8 will mean drilling

macafee2
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Old 20th October 2020, 15:00   #2
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Have you tried Screwfix?
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Old 20th October 2020, 15:14   #3
macafee2
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Quote:
Originally Posted by planenut View Post
Have you tried Screwfix?
far too specialized for them. I'm not even sure if the size was ever available. The screws I have are probably imperial, but I don't know what.
Measuring the diameter of the thread does not match any size.

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Old 20th October 2020, 15:20   #4
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Default Try these.

Quote:
Originally Posted by macafee2 View Post
Could you ever buy 9/32 or 7mm countersunk machine screws?
looking at the internet I cant find either.

If you know where I could get 3 with nuts, self locking preferably, please do tell.

6mm is a bit sloppy in the hole, 8 will mean drilling

macafee2
Try Brabbin and Rudd of Wigan, engineers supplies and very helpful. The number is 01942 242933. Failing that I have a large box of assorted nuts and bolts of various imperial sizes, maybe I can go through them if all else fails.
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Old 20th October 2020, 15:21   #5
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Quote:
Originally Posted by macafee2 View Post
far too specialized for them. I'm not even sure if the size was ever available. The screws I have are probably imperial, but I don't know what.
Measuring the diameter of the thread does not match any size.

macafee2
I've never found the diameter of a screw thread to be over size. However on mass production, threads sometimes come out undersize. Maybe if you went up a fraction you might find what your looking for.

Last edited by COLVERT; 20th October 2020 at 15:34..
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Old 20th October 2020, 15:28   #6
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Try pro bolt , huge range in different materials.

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Old 20th October 2020, 15:31   #7
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Quote:
Originally Posted by macafee2 View Post
far too specialized for them. I'm not even sure if the size was ever available. The screws I have are probably imperial, but I don't know what.
Measuring the diameter of the thread does not match any size.

macafee2
have you got a set of Zeus charts and a Vernier calliper?

Sounds like they could be imperial if they are a nat's under 8mm. Then count the tpi of the screw (I found on very small screws, it was easier to take a photo of the thread against a ruler and then expand on the screen)

Bit of calculation should tell you what they are.

My best guess is that they are either 1/4" or 5/16" something or other.

I did wonder if they are BA, they 0BA is 6mm o/d so unlikely to be that.

Last edited by kelvo; 20th October 2020 at 15:59..
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Old 20th October 2020, 18:18   #8
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thank you for the replies, I will look into this again tomorrow afternoon

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Old 20th October 2020, 18:32   #9
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I have a few 7mm nylocs somewhere if it helps FOC.
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Old 20th October 2020, 18:35   #10
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Quote:
Originally Posted by macafee2 View Post
Could you ever buy 9/32 or 7mm countersunk machine screws?
looking at the internet I cant find either.

If you know where I could get 3 with nuts, self locking preferably, please do tell.

6mm is a bit sloppy in the hole, 8 will mean drilling

macafee2
Have a search for 9/32" UNF, they do exist and are used for things like model making and the legacy aircraft industry.

Last edited by rab60bit; 21st October 2020 at 10:12..
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