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Hot Topic (More than 10 Replies) Smallest Gun Screw (Read 1186 times)
n.r.davis
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Smallest Gun Screw
Sep 18th, 2022 at 8:00pm
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Got my first German Martini Off Hand Rifle this week.  The Sights intrigued me.  At first I thought these were Rivits holding on the U Notch on the Mid Barrel Sight.  Smallest I've ever dealt with.  I'll take a Dozen please.  One to replace the one I will drop, no use looking for it, and the rest for peace of mind.  David
  
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Crown-C
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Re: Smallest Gun Screw
Reply #1 - Sep 18th, 2022 at 8:18pm
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Brownells set of fillister head screws have some really small screws, but I’m not sure if they are that small with the correct TPI. Would have to look tomorrow and check my set out.
  

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n.r.davis
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Re: Smallest Gun Screw
Reply #2 - Sep 18th, 2022 at 8:22pm
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Make it more challenging, Metric of course!
  
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Schutzenbob
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Re: Smallest Gun Screw
Reply #3 - Sep 18th, 2022 at 8:54pm
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Some old scopes used watch screws to hold the crosshairs, and I've seen watch screws in a few old set-triggers too.
  
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n.r.davis
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Re: Smallest Gun Screw
Reply #4 - Sep 18th, 2022 at 9:58pm
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Easy enough to find information on Small Screws, not so easy on Miniature Screws.  Best I've come up with.  Got a 1920's Machinery Handbook I'll look at in the morning.
  
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GT
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Re: Smallest Gun Screw
Reply #5 - Sep 18th, 2022 at 11:38pm
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David,
If they are in fact metric, check out Micro-Mark they have screws down to .5mm diameter or make them...
Making a micro size screw isn't too tough either, it's a single pass cut with a real sharp tool.  If the thread isn't too long, a 1/4 of a thread difference or less won't really be noticed - calculate the pitch and find a feed rate that's close.  Example: .025" dia. 140 thread needs a feed rate of .007142 and a thread depth of .004"
my 2¢
Greg
  

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Grumpy gumpy
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Re: Smallest Gun Screw
Reply #6 - Sep 19th, 2022 at 12:34am
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I’ve made 10 BA screws before.....well....I made about 5 before I got one that worked. It was for a BSA adjustable diopter that I lost the screw for.
Gumpy
  
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Deadeye Bly
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Re: Smallest Gun Screw
Reply #7 - Sep 19th, 2022 at 11:02am
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The screws in the Model 1 Maynard tang sight are #2 size. I've made several of them single point in my 9" South Bend lathe. That is as small as I've made. The later tang sight screws were #3 size.
  
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Spud
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Re: Smallest Gun Screw
Reply #8 - Sep 19th, 2022 at 7:05pm
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I learnt the hard way Angry, now use a magnetic catching tray when taking apart parts with tiny screws.... best $10 I ever spent.

Spud
  
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n.r.davis
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Re: Smallest Gun Screw
Reply #9 - Sep 19th, 2022 at 8:00pm
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Thanks for the idea Spud.
Never thought of that, on my list!  David
  
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yamoon
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Re: Smallest Gun Screw
Reply #10 - Sep 19th, 2022 at 8:35pm
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I have a ribbed rubber mat on my bench, the small parts can’t roll off and disappear on the not so clean floor.
Mike
  
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Skalkaho
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Re: Smallest Gun Screw
Reply #11 - Sep 20th, 2022 at 9:14am
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I ALWAYS set a small magnet by screw I am taking out.Also in putting it back in! Keep meaning to buy a magnet mat,say 10x10" the kind used to put on your car door for advertisement........
  

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marlinguy
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Re: Smallest Gun Screw
Reply #12 - Sep 20th, 2022 at 5:29pm
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I have several Harbor Freight magnetic dishes that I keep around my gun room, and my two shops for gun or car part that are small. Anything that might be small enough to fall and be lost goes into the magnetic dishes as I disassemble. They've kept me from losing a lot of little screws over the years.
  

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Cbashooter
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Re: Smallest Gun Screw
Reply #13 - Sep 20th, 2022 at 9:31pm
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marlinguy wrote on Sep 20th, 2022 at 5:29pm:
I have several Harbor Freight magnetic dishes that I keep around my gun room, and my two shops for gun or car part that are small. Anything that might be small enough to fall and be lost goes into the magnetic dishes as I disassemble. They've kept me from losing a lot of little screws over the years.


I'm so scattered and unorganized I've lost butstocks minutes after taking them off.
  
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JLouis
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Re: Smallest Gun Screw
Reply #14 - Sep 21st, 2022 at 3:39pm
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