Smith & Wesson Forum

Go Back   Smith & Wesson Forum > >

S&W-Smithing Maintenance, Repair, and Enhancement of Smith & Wesson and Other Firearms.


Reply
 
Thread Tools Display Modes
  #1  
Old 12-31-2010, 06:28 PM
Alk8944's Avatar
Alk8944 Alk8944 is offline
Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Jan 2007
Location: Sandy Utah
Posts: 6,920
Likes: 826
Liked 5,054 Times in 2,211 Posts
Default Thread sizes

This isn't a question, but an answer to everyone who has asked what is the thread size for S&W stock and sideplate screws. This started as a project to make replica stock screw sets that match the old style screws & escutcheons that were deep and had the collar that was flush with the stock surface as the diamond stocks were.

Often I have seen this question asked and inevitably there is a response that thread sizes have changed over time. This is incorrect. After checking several of my S&W revolvers in J, K and N-Frame, wood and hard rubber stocks, manufactured from 1905 to the 1990s when wood stocks made in the S&W "Stock Job" ceased to exist, this is the result.

The thread size for both stock screws and sideplate/yoke screws was 5-44 NF for all guns checked. This is only logical if you think about it.

Surprise! Now you know. And, before someone contradicts this and says that the new style "Yoke screw assembly" has a different thread, that is correct. This post only addresses the original style solid yoke/sideplate screws. Stock screws do vary in length depending on stock style and frame size, but only in length.

Last edited by Alk8944; 12-31-2010 at 06:30 PM.
Reply With Quote
The Following 3 Users Like Post:
  #2  
Old 12-31-2010, 07:27 PM
500 Magnum Nut's Avatar
500 Magnum Nut 500 Magnum Nut is offline
Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: May 2004
Location: Connecticut, USA
Posts: 1,527
Likes: 0
Liked 126 Times in 46 Posts
Default

I can't even see that without a good magnifiying glass. .125 diameter that is 44 TPI = 5-44 thread.

I don't even have a tap like that here. That would be tricky to tap being that small & fine...

I leave it to younger eyes.
__________________
NRA Benefactor Member
Reply With Quote
  #3  
Old 01-02-2011, 02:39 PM
Armen Armen is offline
Member
 
Join Date: Mar 2009
Posts: 30
Likes: 0
Liked 0 Times in 0 Posts
Default Yoke screw change

When you refer to the newer yoke screws, what year/series do you mean?
thanks,
-Armen
Reply With Quote
  #4  
Old 01-02-2011, 04:19 PM
500 Magnum Nut's Avatar
500 Magnum Nut 500 Magnum Nut is offline
Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: May 2004
Location: Connecticut, USA
Posts: 1,527
Likes: 0
Liked 126 Times in 46 Posts
Default

The new yoke screws have spring and plungers built in.
Around the eighties they were updated, from the basic screw.
__________________
NRA Benefactor Member
Reply With Quote
  #5  
Old 01-02-2011, 04:28 PM
Gun 4 Fun Gun 4 Fun is offline
SWCA Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Nov 2008
Location: Michigan
Posts: 6,030
Likes: 1,061
Liked 743 Times in 357 Posts
Default

Quote:
Originally Posted by 500 Magnum Nut View Post
The new yoke screws have spring and plungers built in.
Around the eighties they were updated, from the basic screw.
1988 to be exact.
Reply With Quote
  #6  
Old 09-15-2016, 10:58 AM
Protocall_Design Protocall_Design is offline
Vendor
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Jan 2010
Location: Kansas City area
Posts: 3,123
Likes: 12,143
Liked 5,035 Times in 1,896 Posts
Default

What is the thread size of the larger plunger screw?
Reply With Quote
  #7  
Old 09-15-2016, 11:33 AM
gmborkovic gmborkovic is offline
SWCA Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Feb 2014
Location: VA & SoFL
Posts: 5,992
Likes: 282
Liked 3,476 Times in 2,008 Posts
Default

Hello Alk, recheck your I&J frame grip screw. Im coming up with 3-48?
That little bug screw (lock screw) on the top plate screw is 4-48.
The 5-44 taps and dies are not at the Ace store.
__________________
Mike 2796
SoFo Bunch member
Reply With Quote
  #8  
Old 09-15-2016, 11:48 AM
Protocall_Design Protocall_Design is offline
Vendor
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Jan 2010
Location: Kansas City area
Posts: 3,123
Likes: 12,143
Liked 5,035 Times in 1,896 Posts
Default

You can order a lot of oddball taps & dies on eBay.

Last edited by Protocall_Design; 09-15-2016 at 01:26 PM.
Reply With Quote
  #9  
Old 09-15-2016, 11:54 AM
armorer951's Avatar
armorer951 armorer951 is online now
SWCA Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: May 2012
Location: Evansville, Indiana USA
Posts: 4,903
Likes: 274
Liked 7,069 Times in 2,438 Posts
Default

Larger plunger fitted yoke screw is 8X36
__________________
Ret LE, FA Instr, S&W Armorer
Reply With Quote
  #10  
Old 09-15-2016, 12:54 PM
gmborkovic gmborkovic is offline
SWCA Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Feb 2014
Location: VA & SoFL
Posts: 5,992
Likes: 282
Liked 3,476 Times in 2,008 Posts
Default

If you order a cheap tap and die, that is exactly what you get.
I get mine out of Gemany and Switzerland at a primo price.
The quality is the best in the world. Dont go cheap on machine tools and gun parts. Pays off in the long run.
__________________
Mike 2796
SoFo Bunch member
Reply With Quote
The Following 3 Users Like Post:
  #11  
Old 09-15-2016, 02:12 PM
JDBoardman JDBoardman is offline
US Veteran
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: May 2009
Location: Dallas, Texas
Posts: 294
Likes: 52
Liked 321 Times in 121 Posts
Default

Does anyone know what the thread size is for the rear sight windage screw? I have a Meprolight rear sight, and the stock S&W windage screws will not go through it - they get progressively tighter and ultimately break off. My problem is that the sight screw detent pin jammed in the Meprolight screw, and consequently will not give me "clicks" for adjustment.
Reply With Quote
  #12  
Old 09-15-2016, 02:24 PM
sjb66coronet sjb66coronet is offline
Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Feb 2011
Location: southern louisiana
Posts: 139
Likes: 112
Liked 60 Times in 31 Posts
Default

Not sure about the frame and sight screws,but the older(pre 1970's) J frame stock screws were 3-48.
Reply With Quote
  #13  
Old 09-15-2016, 02:41 PM
Protocall_Design Protocall_Design is offline
Vendor
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Jan 2010
Location: Kansas City area
Posts: 3,123
Likes: 12,143
Liked 5,035 Times in 1,896 Posts
Default

The rear sight elevation and windage screws are #3-80.
Reply With Quote
  #14  
Old 11-14-2017, 10:57 PM
benblas49 benblas49 is offline
Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Feb 2017
Posts: 4
Likes: 1
Liked 0 Times in 0 Posts
Default

what is the thread size on a s&w 460 leaf spring rear site appears to be abt 6 x 40 0r42
Reply With Quote
  #15  
Old 11-15-2017, 02:18 AM
drgbike's Avatar
drgbike drgbike is offline
Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Apr 2012
Location: South Western,PA.
Posts: 450
Likes: 909
Liked 455 Times in 179 Posts
Default threads

Tapsanddies.com. They have all the sizes, have puchased from them several time. Not real expensive. Quality seems first rate, buy a couple, drills also, not very common. Remember small stuff breaks. So go slooow! Also helps to have a jig.
__________________
"I'm feeling MUCH better now"
Reply With Quote
  #16  
Old 11-16-2017, 08:02 AM
stu1ritter's Avatar
stu1ritter stu1ritter is offline
US Veteran
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Jul 2010
Location: Denver, CO
Posts: 1,883
Likes: 664
Liked 3,073 Times in 820 Posts
Default

drgbike, that link should read tapsndies.com. Thanks for pointing me there, interesting place.

Stu
Reply With Quote
  #17  
Old 11-16-2017, 01:24 PM
Tired Gunsmith Tired Gunsmith is offline
Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Mar 2009
Location: Hillsboro Beach, FL
Posts: 418
Likes: 20
Liked 232 Times in 112 Posts
Default

Brownells Encyclopedia has charts ( somewhat dated) showing screw sizes for almost every firearm found at the time it was published.
Reply With Quote
  #18  
Old 11-16-2017, 04:46 PM
Hondo44 Hondo44 is offline
SWCA Member
Thread sizes Thread sizes Thread sizes Thread sizes Thread sizes  
Join Date: Oct 2007
Location: California
Posts: 16,109
Likes: 7,613
Liked 15,276 Times in 6,417 Posts
Default

S&W standardized it's screw sizes:

The sideplate and stock screws specification change order of March 4, 1942 was just that: a specification change in the standardization of tolerances for screw diameter. A change from old S&W 'smaller minimum diameter' tolerance to the larger minimum standardized tolerance of the #5 National Fine (N.F.) screw diameter (no, the 44 threads per inch did not change). It refers specifically to the sideplate screws (but excluding the bug screw or upper sideplate screw which is a 4-48 pre and post war) and also the #5 N.F. stock screws. Therefore, there CAN BE a difference between 'pre-change' and 'post-change' screws and they CAN measure different diameters. Sometimes they are interchangeable and sometimes not. After 3/4/42 K & N stock screws became #5-44 NF with an upper OD tolerance of .125" and usually measure .122”+or-.

Prewar K & N stock screws were 44 TPI but the O.D. upper tolerance was only .122" but usually measure closer to .119"+or-. Therefore, if you try to use a standard 5-44 or a post war stock screw, they are a bit oversize. One or two thousandths isn't a lot but makes a big difference on such a small diameter. Usually 5-44 /post war stock screws can be made to work by decreasing the OD with fine grit sandpaper.
Just FYI, pre war I frame stock screws are close to a 3-48, but again, slightly smaller in OD. I & J frames became a standard 3-48 until I frames were discontinued and ~ 1980s when J became 5-44 also.

The 1988 new larger yoke retention screw with plunger is 8X36 and non-fitted.
__________________
Jim
S&WCA #819

Last edited by Hondo44; 11-16-2017 at 04:56 PM.
Reply With Quote
Reply

Tags
n-frame, sideplate

Thread Tools
Display Modes

Posting Rules
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Numrich Stud Thread Sizes?? Rich B. S&W-Smithing 19 09-09-2014 06:58 AM
The Big and Little Sizes Granddad S&W Revolvers: 1961 to 1980 1 04-11-2013 03:00 PM
Pre 29 box sizes MP1518 S&W Hand Ejectors: 1896 to 1961 2 09-26-2012 03:42 PM
1936 M&P sideplate screw thread sizes ImJustTired S&W-Smithing 2 09-16-2010 07:20 PM

Powered by vBadvanced CMPS v3.2.3
smith-wessonforum.com tested by Norton Internet Security smith-wessonforum.com tested by McAfee Internet Security

All times are GMT -4. The time now is 10:22 PM.


Search Engine Optimisation provided by DragonByte SEO v2.0.42 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Smith-WessonForum.com is not affiliated with Smith & Wesson Holding Corporation (NASDAQ Global Select: SWHC)