Bolt head measurement
Printed From: Enfield-Rifles.com
Category: Enfields
Forum Name: Ishapore Enfields
Forum Description: Let's see those Indian Enfields!
URL: http://www.enfield-rifles.com/forum_posts.asp?TID=10974
Printed Date: March 26 2026 at 6:35pm
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com
Topic: Bolt head measurement
Posted By: Frameman 1
Subject: Bolt head measurement
Date Posted: 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?
------------- There are no Americans in Baghdad!! |
Replies:
Posted By: britrifles
Date 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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Posted By: Frameman 1
Date 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. ------------- There are no Americans in Baghdad!! |
Posted By: The Armourer
Date Posted: November 26 2020 at 1:21pm
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deleted
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Posted By: The Armourer
Date Posted: November 26 2020 at 1:24pm
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Posted By: Frameman 1
Date 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 😎 ------------- There are no Americans in Baghdad!! |
Posted By: Goosic
Date Posted: November 26 2020 at 2:19pm
Is this in regards to the No1Mk111/* rifles?
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Frameman 1 wrote:Posted By: Shamu
Date 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?
------------- Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force) |
Posted By: Shamu
Date Posted: November 26 2020 at 2:45pm
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Here's the one I was thinking of. https://www.enfield-rifles.com/no4-no5-bolt-head-sizes-update_topic5019.html" rel="nofollow - https://www.enfield-rifles.com/no4-no5-bolt-head-sizes-update_topic5019.html ------------- Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force) |
Posted By: Goosic
Date Posted: November 26 2020 at 3:47pm
| 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. |
Posted By: Frameman 1
Date 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?    ------------- There are no Americans in Baghdad!! |
Posted By: Frameman 1
Date Posted: November 26 2020 at 4:04pm
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The rifle in question is an Ishapore 2A ------------- There are no Americans in Baghdad!! |
Posted By: Goosic
Date Posted: November 26 2020 at 4:16pm
| 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. |
Posted By: Frameman 1
Date Posted: November 26 2020 at 4:20pm
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From what I’m reading, I believe this to be the case. ------------- There are no Americans in Baghdad!! |
Posted By: Shamu
Date 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? ------------- Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force) |
Posted By: Frameman 1
Date 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? ------------- There are no Americans in Baghdad!! |
Posted By: Goosic
Date Posted: November 27 2020 at 1:01pm
According to the big Enfield Bible, it means, "Spare Component."
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Posted By: The Armourer
Date Posted: November 27 2020 at 1:03pm
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Posted By: Frameman 1
Date Posted: November 27 2020 at 1:12pm
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I’ll measure it this evening and see what I have. ------------- There are no Americans in Baghdad!! |