S&W K Frame Model 10 Thumb Piece & Nut Blue Steel .38 Special, Part 10179B

Smith & Wesson K Frame Model 10 Thumb Piece & Nut — Blue Steel

Part #10179B | Used OEM Factory Part | .38 Special

• Fits: S&W K Frame Model 10
• Finish: Blue Steel
• Caliber: .38 Special
• Condition: Used — original Smith & Wesson factory part, old style
• Frame Size: K Frame
• Includes: Thumb Piece and Nut

The thumb piece (cylinder release latch) and nut are essential for proper cylinder swing-out function. A worn or damaged thumb piece can cause the cylinder to fail to release cleanly, affecting both speed and reliability. This used OEM assembly restores factory-correct operation.

Installation Note: Disassembly and reassembly required. Some fitting by a qualified gunsmith may be necessary.

How to Identify Your S&W Model Number

Swing out the cylinder and check behind the yoke on the frame. Model numbers were introduced in 1957–58. If no model number is present, your revolver may pre-date that era — contact us with your serial number and we can help identify the correct part.

We specialize in new, used, and new-old-stock Smith & Wesson double-action revolver parts. Contact us for any S&W parts needs.