Smith & Wesson K Frame Thumb Piece & Nut Blue Steel Old Style - 10179E
$22.99
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Smith & Wesson K Frame Thumb Piece & Nut Blue Steel Old Style - 10179E
$22.99
Smith & Wesson K Frame Thumb Piece & Nut – Blue Steel, Old Style
This factory original Smith & Wesson K Frame Thumb Piece & Nut Assembly is the external cylinder release lever and its retaining nut. The thumb piece is pressed 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. A worn, bent, or broken thumb piece makes normal revolver operation impossible and must be replaced to restore function.
Part Details
- Part Number: 10179E
- Manufacturer: Smith & Wesson
- Frame: K Frame (Medium Frame)
- Finish: Blue Steel
- Style: Old Style
- Includes: Thumb Piece + Retaining Nut
- Function: Cylinder Release Latch Lever
- Condition: Used – Factory Original, Functional
Model Compatibility
| Model | Caliber | Finish | Compatible |
|---|---|---|---|
| 10, 10-10, 12 | .38 Special | Blue | ✓ Yes |
| 13 | .357 Magnum | Blue | ✓ Yes |
| 14, 15 | .38 Special | Blue | ✓ Yes |
| 16 | .32 Long | Blue | ✓ Yes |
| 17, K22 | .22 LR | Blue | ✓ Yes |
| 18 | .22 LR | Blue | ✓ Yes |
| 19 | .357 Magnum | Blue | ✓ Yes |
| 48 | .22 Magnum | Blue | ✓ Yes |
| 64, 65, 66, 67 | Various | Stainless | ✗ Verify – Stainless models may use different finish thumb piece |
| 617, 648 | Various | Stainless | ✗ Verify – Check finish compatibility |
| L Frame models | Various | Various | ✗ Not Compatible – Different thumb piece |
⚠️ This is the old style, blue steel K Frame thumb piece. The thumb piece is interchangeable across centerfire and rimfire blued K Frame models — not caliber-specific. Stainless models may require a stainless thumb piece for finish matching. Verify your revolver's finish and style before ordering.
Installation Note
Thumb piece and nut replacement is a relatively straightforward repair requiring removal of the cylinder and access to the latch mechanism. Professional gunsmith installation is recommended to ensure proper fit and smooth cylinder release without binding.