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Bolt head measurement |
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Frameman 1 
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Joined: July 30 2019 Location: SW Ohio Status: Offline Points: 382 |
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 Topic: Bolt head measurementPosted: November 26 2020 at 12:01pm |
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Does anyone have a chart which lists the correlation between the bolt head thickness and the bolt head number?
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There are no Americans in Baghdad!!
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britrifles
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Posted: November 26 2020 at 12:48pm |
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I’ve seen it on this forum, not sure how hard it is to find those posts again....
And there is considerable overlap in lengths from measurements of bolt heads. I.e. it’s possible that a #1 bolt head is longer than a #3 bolt head. If your headspacing a rifle, you may have to have a collection of bolt heads to try.
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Frameman 1
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Posted: November 26 2020 at 1:18pm |
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Starting a collection was what I’d hoped to avoid but if it’s necessary, so be it.
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There are no Americans in Baghdad!!
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The Armourer
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Posted: November 26 2020 at 1:21pm |
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The Armourer
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Posted: November 26 2020 at 1:24pm |
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Frameman 1
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Posted: November 26 2020 at 1:38pm |
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Thanks gents!
This info will give something to do. Thanksgiving this year is a little subdued 😎
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There are no Americans in Baghdad!!
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Goosic
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Posted: November 26 2020 at 2:19pm |
Is this in regards to the No1Mk111/* rifles?
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Shamu
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Posted: November 26 2020 at 2:34pm |
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I don't think it can be, numbered bolt heads were a no4 or No5 thing. I've seen such a summary on here, a while back, but I thought it came from The Armourer? Maybe do a few searches for "bolt head", "Lengths & Numbers", "Head Spacing" & similar terms?
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Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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Shamu
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Posted: November 26 2020 at 2:45pm |
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Here's the one I was thinking of. |
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Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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Goosic
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Posted: November 26 2020 at 3:47pm |
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I was basing my question off of this topic being listed in the Ishapore Enfield section and not under the Enfield Rifle section and solely an assumption that I made because of that.
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Frameman 1
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Posted: November 26 2020 at 4:00pm |
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Here are a few photos of one of my bolt heads.
Any help with markings?
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Frameman 1
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Posted: November 26 2020 at 4:04pm |
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The rifle in question is an Ishapore 2A
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Goosic
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Posted: November 26 2020 at 4:16pm |
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There are no bolthead numbers in corresponding lengths for the rifle you are referencing. The number on your bolthead is just a stamp indicating who made that particular item. Somebody here will know this for certain but I was made to believe that your particular bolthead was hand fitted to the rifle by having the face of the bolthead machined down in very small increments until proper headspacing was achieved by starting with a longer than normal bolthead.
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Frameman 1
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Posted: November 26 2020 at 4:20pm |
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From what I’m reading, I believe this to be the case.
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Shamu
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Posted: November 27 2020 at 6:46am |
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Yes, exactly. That's how it was done. IIRC there was a stamp on the actual face when issued. That meant it had never been fitted to anything. "L" Maybe?
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Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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Frameman 1
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Posted: November 27 2020 at 12:57pm |
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In my top photo right above the cutout area of the rail hook there is an S stamped in the side. Sorry for the poor resolution.
What does this indicate?
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Frameman 1 wrote: