Smith & Wesson K Frame Model 10 Thumb Piece & Nut Blue Steel Old Style Used Part 10179D

Smith & Wesson K Frame Model 10 Thumb Piece & Nut — Blue Steel Old Style | Used | Part #10179D

Factory OEM thumb piece and nut assembly for Smith & Wesson K Frame Model 10 revolvers, old style design in blue steel finish. The thumb piece is the external lever you press to release the cylinder latch, allowing the cylinder to swing out for loading, unloading, and cleaning. The nut secures the thumb piece to the cylinder latch mechanism inside the frame. Genuine S&W factory part in used condition.

This listing is for the thumb piece and nut assembly only. Condition: Used, factory original.

Specifications

• Part Number: 10179D
• Frame: K Frame
• Model: Model 10
• Caliber: .38 Special
• Design: Old Style
• Components: Thumb Piece + Nut
• Finish: Blue Steel
• Condition: Used / Factory Original OEM

Model Compatibility Chart

This old style thumb piece is specific to blued K Frame Model 10 revolvers. Verify fitment before ordering — thumb piece design and nut thread pitch can vary between production runs and dash numbers. Not compatible with stainless (Model 64) or later production models using updated thumb piece designs.

Function

Pressing the thumb piece rearward releases the cylinder latch, allowing the cylinder to swing out on the crane for loading and unloading. The nut threads onto the cylinder latch stud inside the frame to retain the thumb piece. A worn, bent, or damaged thumb piece can cause the cylinder to fail to latch securely or release unexpectedly.

Installation Note

Gunsmith installation recommended. Proper fitting ensures smooth cylinder release without binding or excessive play. Incorrect installation can affect cylinder lockup and safe operation.