BSA Cadet Front Stock Screws being manufactured for me

[Jenny Dipple]

when I need screws it involves a 26mile round trip so perhaps more than 25p each. My supplier is Norton Fasteners in Letchworth Herts. They are very helpfull, and have always identified the thread pitch.

[MattyBoy]

when I need screws it involves a 26mile round trip so perhaps more than 25p each. My supplier is Norton Fasteners in Letchworth Herts. They are very helpfull, and have always identified the thread pitch.

Thanks Terry I will bear them in mind

1/4 BSF (8/32") is the smallest common size understandably and these are available from everywhere you can think of.

Why a manufacturer of a gun would choose to go that small step down from the common 8/32" to the little used 7/32" baffles me somewhat

[Nitro-Express]

Many ( if not most ) gunmakers did it. I formed the opinion that it was to prevent you repairing their products with readily available off the shelf stuff.
I find a common size on guns is .203" (13/64") diameter. This is just .015" smaller than the 7/32" under discussion, and is a non-standard size, thus necessitating return to or spares from the maker. Unless you are a toolmaker! Also, BA threads are not uncommon.

[MattyBoy]

Many ( if not most ) gunmakers did it. I formed the opinion that it was to prevent you repairing their products with readily available off the shelf stuff.
I find a common size on guns is .203" (13/64") diameter. This is just .015" smaller than the 7/32" under discussion, and is a non-standard size, thus necessitating return to or spares from the maker. Unless you are a toolmaker! Also, BA threads are not uncommon.

Well the 7/32 thread that my chap has run up is too tight in the gun so maybe it is this 13/64

I too hold the same opinion that it's to make you spend more money

Just spoken to my chap who will now grind a small piece off the open gap in the die to enable it to be closed down even further.

I gave him a screw out of my 1949 Major and this fits the die - but loosely! This seems to bear out the 13/64 theory! Crafty beggers...

[basa]

would it not be quicker to weld/fill holes retap in metric /or more common size.

[Nitro-Express]

would it not be quicker to weld/fill holes retap in metric /or more common size.

That should baffle the next owner!

[MattyBoy]

would it not be quicker to weld/fill holes retap in metric /or more common size.

OUCH!

You heathen!

This is going to be a near-minter so I would hate to abuse it in that way

[DedIdick]

You could, of course, bite the bullet and just buy the right ones from Chambers and do away with all the pissin about!

[RichardH]

Thanks Terry I will bear them in mind

1/4 BSF (8/32") is the smallest common size understandably and these are available from everywhere you can think of.

Why a manufacturer of a gun would choose to go that small step down from the common 8/32" to the little used 7/32" baffles me somewhat

Matt

From memory Cadet screws are a fairly standard size, you might just need to tighten the die down.... that or invest in a lathe

Rich

[MattyBoy]

Matt

From memory Cadet screws are a fairly standard size, you might just need to tighten the die down.... that or invest in a lathe

Rich

Hi Rich, hope all is well

My chap will tighten it down after cutting/grinding a bit out of the split and try again.

I thought it would be a 30 minute job and it's turned into a saga

"All the glorious trials of youth, dear boy" as Uncle Monty would say

[Binners]

Matt

From memory Cadet screws are a fairly standard size, you might just need to tighten the die down.... that or invest in a lathe

Rich

I had a spare pair once...got a spare lathe for sale on here, if that helps

[RichardH]

The problem with all machine tools is every five minute job seems to require £50 of extra tooling

I sometimes wonder whether its better just to take out a chambers mortgage each time

[Troubledshooter]

Being BSA, it's always possible they are BCT - British Cycle Thread.
The fore end screws for both Cadet and Major have the same part number, 16-717.
The diameter of the screw thread is 3/16", but I can't find my pitch guage.

[Tantomurata]

it's always possible they are BCT - British Cycle Thread.

Most cycle thread is the same pitch 26 tpi, regardless of diameter. The larger sizes then go 20 tpi.