Smith & Wesson Center Pin Spring J Frame and Older K Frame Models 31 32 34 63 631 632 650 651 - 071330000

Smith & Wesson Center Pin Spring - Part #071330000

Factory OEM center pin spring designed for specific J Frame models and select older K Frame revolvers. This critical spring retains the cylinder center pin, ensuring proper cylinder operation and reliable lockup.

Compatible J Frame Models:

• Model 31 (.32 S&W Long) - 1960-1992
• Model 32 (.38 S&W) - 1960-1974
• Model 34 (.22 LR rimfire) - 1960-1991 (Kit Gun)
• Model 63 (.22 LR rimfire, stainless) - 1977-1998 (Kit Gun)
• Model 631 (.32 H&R Magnum, stainless) - 1990-1992
• Model 632 (.32 H&R Magnum, stainless, Centennial) - 1991-1992
• Model 650 (.22 WMR rimfire) - 1983-1987
• Model 651 (.22 WMR rimfire, stainless, Kit Gun) - 1983-1987, 1990-1998

Compatible K Frame Models:

Older K Frame models (pre-1957 and early production models). Contact us with your serial number to verify compatibility for your specific K Frame revolver.

Caliber Compatibility:

J Frame: .22 LR (rimfire), .22 WMR (rimfire), .32 S&W Long, .32 H&R Magnum, .38 S&W

K Frame: Older models (various calibers)

Key Features:

• Factory new OEM component - authentic Smith & Wesson quality
• Precision spring steel construction for consistent retention
• Essential for proper cylinder swing-out and lockup
• Direct replacement part for specific models listed above
• Ensures smooth cylinder operation

Function:

The center pin spring retains the cylinder center pin in place, which secures the cylinder to the crane (yoke) assembly. It ensures proper cylinder alignment, smooth rotation, and reliable lockup. Replace if worn or if experiencing cylinder retention issues.

Installation:

Gunsmith installation recommended - requires disassembly and reassembly of cylinder crane mechanism.

Need Help Identifying Your Model?

Swing out the cylinder and check behind the yoke on the frame for a model number. Model numbers began in 1957-58. If there is no model number, your revolver is from the Pre-Model era (pre-1957). Contact us with your serial number and we can help identify the correct parts.

We specialize in used, new, and new old stock Smith & Wesson double action revolver parts. Contact us for all your S&W part needs!