Smith & Wesson K Frame Cylinder Bolt, Spring & Plunger - Old Style, Part# 6645D

Smith & Wesson K Frame Cylinder Bolt, Spring & Plunger – Old Style

Keep your S&W K Frame revolver cycling reliably with this genuine OEM-grade cylinder bolt assembly. This used old-style set includes the bolt, spring, and plunger — the components responsible for locking the cylinder in place during firing.

Part Details

• Part Number: 6645D
• Condition: Used – Old Style
• Frame Size: K Frame
• Caliber: Centerfire (.357 Magnum / .38 Special)

Compatible Models

This old-style bolt, spring & plunger fits centerfire S&W K Frame revolvers including:

• Model 10, 11, 12, 13, 14, 15, 16
• Model 19, 64, 65, 66, 66-1, 66-2, 66-3, 67

Note: Not compatible with rimfire K Frame models (17, 18, 48, 617, 648). Verify your model before ordering.

Why This Part?

The cylinder bolt is a critical lockup component. A worn or broken bolt causes cylinder play and timing issues. Replacing it with a correct OEM part restores proper lockup and safe function.