#3 Bolt Head for No4 Mk1

[GaCop]

I 've had this bolt head for probably 20 years now. Has a "M" stamp I assume is Maltby? I was wondering what it is worth. Has the extractor but no spring. No rust or pitting.

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[Alan de Enfield]

I 've had this bolt head for probably 20 years now. Has a "M" stamp I assume is Maltby? I was wondering what it is worth. Has the extractor but no spring. No rust or pitting.

Probably about the same as any other bolt head.

Some years agoI undertook an evaluation of the bolt head sizes Vs 'numbers' and found that 'number 0' could be bigger than 'number 3'.
If you happen to have a 'long number 3' and someone is struggling with head space it may have some value to them.

Without knowing what size (dimension) it is the answer is 'a piece of string'.

The full post is available somewhere on this forum but I cannot find it.

I also posted it here :

No4 Bolt Head Survey and Instructions

[browningautorifle]

Without knowing what size (dimension) it is the answer is 'a piece of string'.

He does say it's a #3... It might bring $30CDN or so. It's worth more to the guy trying to tighten up a loose headspace and not so much to a guy trying to assemble something...at random. Have a look on Ebay or Gunbroker for prices close to you in the USA.

[Alan de Enfield]

He does say it's a #3... It might bring $30CDN or so. It's worth more to the guy trying to tighten up a loose headspace and not so much to a guy trying to assemble something...at random. Have a look on Ebay or Gunbroker for prices close to you in the USA.

And, a number 3 means nothing, a No 0 can be bigger than a No3.
As I said, it is the actual measurement that is important be it a number 0, number 1 or number 3

[browningautorifle]

a number 3 means nothing, a No 0 can be bigger than a No3.

Yes, understood. A long "0" can measure like a short "3"...agreed. I've sat and measure too.

[CINDERS]

Cannot remember where I got this from maybe from this site years ago you lose track with the web anyway this was a survey done of 0 - 3 #4 boltheads and just shows the dispersion of measurements in the series and it true to what Alan De has said but in saying that as one knows as BIO let us know that the lock up on a Lee enfield is spherical so just changing a bolt head to tighten CHS may put more pressure somewhere else thats what I have learned here since being a member.

[Alan de Enfield]

Cannot remember where I got this from maybe from this site years ago you lose track with the web anyway this was a survey done of 0 - 3 #4 boltheads and just shows the dispersion of measurements in the series and it true to what Alan De has said but in saying that as one knows as BIO let us know that the lock up on a Lee enfield is spherical so just changing a bolt head to tighten CHS may put more pressure somewhere else thats what I have learned here since being a member.

Yes - that is 'my' Excel spreadsheet, I posted it along with pictures (and the importance) of overturn, details on how to do a 'quick and dirty' measurement of your actual headspace, and copies of some of Peter Laidler's notes on correct sizing of bolt heads when head-spacing.

I posted it here but can no longer find it.

[GaCop]

So the "M" could mean it's a medium #3 then. I'll have to measure it, thanks fellas.

[Alan de Enfield]

So the "M" could mean it's a medium #3 then. I'll have to measure it, thanks fellas.

No, the M probably does mean Maltby.

[Bindi2]

Or malleable iron