Barrel threads?

[yahoody]

Anyone know off hand what the barrel threads are on the earlier Uberti parts guns, USA USFA guns, Uberti, Colt 2nd Gen and 3rd Gen? thanks!

[Professor Marvel]

Greetings My Dear Yahoody -

whilst I cannot speak for USFA ( in fact I cannot speak for anyone but myself, lol ) I can offer the meager data Ihave collected in my notes over the course of several lustrum ....

Colt Single Action Barrels Thread

pre-1976:   11/16-20TPI

1976-Current:(3rd gen) thread was changed from 11/16-20TPI to 11/16-24TPI.

11/16"-20 tpi fits intermediate and late Uberti,
11/16"-24 tpi fits Ruger Single Action;
.695"-20 tpi fits 1st and 2nd generation Colts, plus Armi San Marcos and EMF Hartford, .695"-24 tpi fits 3rd generation Colt.

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Pistol:
SPECS: High speed steel.
Colt Single Action, OLD .695" - 20 thread, 1-½" dia. die.
Colt Single Action, NEW 11/16 -24 thread (0.6875)

Smith & Wesson
J Frame, .500"-36 threads. 1" dia. die.
K Frame,  .540"-36 threads. 1" dia. die.
L Frame, .562"-36 thread, 1-½" dia. die. ( 9/16)
N Frame, .670"-36 thread, 1-½" dia. die.

Ruger Single Action (centerfire),
        .680" - 24  thread, 1-½" dia. die. (11/16 = .6875)
GP-100,
       .625"-24 = 5/8-24 thread, 1-½" dia. die.
Redhawk (all models):
       .750 "-20 = 3/4-20,  1-½" dia. die.
"Speed Six"
      .556"-24 tpi  (9/16 = .562)

Virginian Dragoon , 3/4 x 18 ? use 3/4 x 18 and take off .03, clean up with tightened die?
      .715 maj .663 minor

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hope this helps
prof marbels

[yahoody]

thank you Sir!