MSN Home  |  My MSN  |  Hotmail
Sign in to Windows Live ID Web Search:   
go to MSNGroups 
Free Forum Hosting
 
Important Announcement Important Announcement
The MSN Groups service will close in February 2009. You can move your group to Multiply, MSN’s partner for online groups. Learn More
The L1A1 ArmourerContains "mature" content, but not necessarily adult.[email protected] 
  
What's New
  
  The L1A1 Armourer  
  Membership Announcements  
  Message Board  
  
  General  
  
  Open Topic Forum  
  
  AT Weapons Forum  
  
  AK Family Forum  
  
  Bayonet Forum  
  
  Belt Fed Forum  
  
  CETME&HK Forum  
  
  M1,M14 and BM59  
  
  M16 Family Forum  
  
  Pistols Forum  
  
  The Swap Shoppe  
  
  Ask the Armourer  
  
  "War Stories"  
  
  Politics & BS  
  
  Jokes & Humour  
  
  Lest We Forget  
  
  FAQs for Members  
  AASAM 2002 and 2003 Pictures  
  AASAM 2004  
  Pictures  
  Online   
  Member's file cabinet  
  FN FAL links  
  Military/Historical links  
  Militaria links  
  Reference book and magazine links  
  Member's websites  
  Member's Pages  
  Show and Tell  
  Master Gunners AK Manual  
  L85/L86 Forum  
  
  
  Tools  
 
Ask the Armourer : Commonwealth Thread Pitches
Choose another message board		  
     
Reply
 Message 1 of 6 in Discussion 
From: MasterGunner  (Original Message)Sent: 9/3/2006 2:07 AM
MG Note:  With a few exceptions, the thread pitches used by both inch-pattern and metric-pattern FAL rifles are the same.  The pitches used are the standard SAE unified fine threads and not metric pattern.  There is one metric thread used, and that is the barrel thread pitch used on Israeli light barrel rifles and heavy barrel automatic rifles.  The following chart gives inch part name, number or fraction, the decimal equivalent, thread pitch, and any notes associated with a particular part.
 
 Inch Part Number        
Barrel Assembly

Number
Fraction

Decimal
Size

Thread  

  Notes
 Muzzle  9/16  0.5625  24-UNF-2B  Right hand thread.
 Flash Eliminator  9/16  0.5625  24-UNF-2B  Right hand thread.
 Sling Swivel Screw  #8  0.164  36-UNF-2B Slotted flat head machine screw. 
 Handguard Screw  #10  0.1900  32-UNF-2B  Wood and plastic hanguards, 1.250 in. lg.
 Gas Block        
 a. Front Sight/Gas Block  #10  0.190  40-UNF-2A  
 b. Front Sight Setscrew  #8  0.164  36-UNF-2B  Cone point.
 c. Gas Piston Tube/Gas Block  17/21  0.5313  36-UNF-2B  
 Gas Piston Tube Nut  9/16  0.5625  24-UNF-2B  Carrying handle retainer.
 Barrel Threads  1-inch  1.0000  16-UNS-2B  Inch, metric except Israeli.
 Upper Receiver        
 Gas Piston Tube Nut  9/16  0.5625  24-UNF-2B  Carrying handle retainer.
 Barrel Threads  1-inch  1.0000  16-UNS-2B  Inch, metric except Israeli.
 Magazine Catch Screw  #10  0.190  32-UNF-2B  Special slotted head machine screw.
 Lower Receiver        
 Rear Sight Screw  #8  0.164  36-UNF-2B  Slotted filister head machine screw.
 Pivot (Hinge) Pin  1/4  0.250  28-UNF-2B  Inch pattern.
 Pistol Grip        
 a. Wooden Grip  1/4  0.250  28-UNF-2B  1.250 in. lg. socket head cap screw.
 b. Plastic Grip  1/4  0.250  28-UNF-2B  1.250 in. lg. slotted round head machine screw.
 Trigger Guard Screw        
 a. Wooden Grip  #8  0.164  36-UNF-2B  0.625 in. lg. oval slotted head machine screw.
 b. Plastic Grip  #8  0.164  Wood Screw  0.625 in. lg. oval slotted head wood screw.
 Trigger Plate Screw        
 a. Wood Grip  #5  0.125  Wood Screw  0.750 in. lg. oval slotted head wood screw.
 b. Plastic Grip  #6  0.138  Wood Screw  9,750 in. lg. oval slotted head wood screw.
 Recoil Spring Tube        
 a. Outside Diameter  17/32  0.5313  36-UNF-2B  Screws into lower receiver.
 b. Inside Diameter  15/32  0.4688  36-UNF-2B  Recoil spring tube screw screws into recoil spring tube.
 Recoil Spring Tube Screw        
 a. Outside Diameter  15/32  0.5313  36-UNF-2B  Screws into recoil spring tube.
 b. Inside Diameter  1/4  0.250  28-UNF-2B  For butt plate screw (Cdn wood stock) or (Brit plastic stock).
 Frame Lock Lever Screw  #10  0.190  32-UNF-2B  Special slotted head machine screw.
 Wooden Butt Stock        
 a. Upper Butt Plate Screw  #10  0.190  Wood Screw  1.250 in. lg. slotted oval head wood screw.
 b. Lower Butt Plate Screw  #10  03190  32-UNF-2B  1.4375 in. lg. slotted oval head machine screw for butt swivel.
 c. Lower Butt Stock Screw  #8  0.164  Wood Screw  1.000 in. lg. slotted oval head wood screw.
 Plastic Butt Stock        
 a. Lower Sling Swivel Screw  #8  0.164  36-UNF-2B  Slotted flat head machine screw. 
 b. Butt Plate Screw        
 (1) Short Butt Plate  1/4  0.250  28-UNF-2B  1.500 in. lg. slotted oval head machine screw.
 (2) Normal Butt Plate  1/4  0.250  28-UNF-2B  2.000 in. lg. slotted oval head machine screw.
 (3) Long, Extra Long Butt Plate  1/4  0.250  28-UNF-2B  2.500 in. lg. slotted oval head machine screw.
 c. Lower Butt Stock Screw  #6  0.138  Wood Screw  0.750 in. lg. slotted oval head wood screw.
 d. Arctic Side Sling Swivel Screw  #10  0.190  32-UNF-2B  Threaded end of side mounted sling swivel.
 Miscellaneous        
 Front Sight Protector Screw  #8  0.164  36-UNF-2B  Holds L2A1, C2A1, C1A2 (late C1A1) front sight protective
 "ears" to gas block.
         
 
 


First  Previous  2-6 of 6  Next  Last 
Reply
 Message 2 of 6 in Discussion 
From: MSN NicknameFalophileSent: 9/6/2006 6:46 PM
I'm pretty sure that Indian 1A-SL barrels are Metric threaded just like Israeli: M25x1.5. I've also heard that the very earliest of Belgian FAL's are metric too.
 
Very nice chart! 

Reply
 Message 3 of 6 in Discussion 
From: MasterGunnerSent: 9/10/2006 5:03 PM
Correction:
Under the Trigger Plate Screw, Plastic Grip, change to 0.750 in. lg. from 9,750 in. long.

Reply
 Message 4 of 6 in Discussion 
From: MasterGunnerSent: 9/19/2006 2:22 PM
This just in from our resident New Zealand expert, Kevin Adams, for the British plastic furniture screws.  Thanks, Kevin.
 
 
Pistol Grip Cover and Butt Stock Tang Screw (for Plastic Pistol Grip and Butt)
SCREW, tapping, thread-forming, oval counter head, slot drive, dog-point, steel, phosphated, No. 8 x 5/8 inch long.  
 
Pistol Grip Plate (for Plastic Pistol Grip holds the trigger plunger and spring bin place)
SCREW, tapping, thread-forming, oval counter head, slot drive, dog-point, steel, phosphated, No. 6 x 3/4 inch long.

Reply
 Message 5 of 6 in Discussion 
From: MSN NicknameSprMissfireSent: 9/20/2006 12:04 AM
What no Whitworth?

Reply
 Message 6 of 6 in Discussion 
From: MasterGunnerSent: 9/20/2006 2:33 PM
No, there aren't any Whitworth threads in the lot in either Inch-pattern or Metric-pattern FAL rifles.  With the exception of Israeli barrel threads (metric) and, I believe, one other screw on the para-FAL, all threads are the American SAE standard UNF or UNS.

First  Previous  2-6 of 6  Next  Last 
Return to Ask the Armourer