Smith & Wesson K Frame Main Spring Old Style Used Part 64141A
$19.99
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Smith & Wesson K Frame Main Spring Old Style Used Part 64141A
$19.99
Smith & Wesson K Frame Main Spring — Old Style | Used | Part #64141A
Factory OEM main spring (hammer spring) for Smith & Wesson K Frame revolvers, old style design. This is the coil spring that drives the hammer forward to ignite the primer — a critical component for reliable ignition and consistent trigger pull. Genuine S&W factory part in used condition.
This listing is for the main spring only. Condition: Used, factory original.
Specifications
- Part Number: 64141A
- Frame: K Frame
- Design: Old Style
- Type: Coil Main Spring (Hammer Spring)
- Material: Steel
- Condition: Used / Factory Original OEM
Model Compatibility Chart
| Model | Caliber | Notes |
|---|---|---|
| Model 10 | .38 Special | All variants |
| Model 11 | .38 Special | Military & Police |
| Model 12 | .38 Special | Airweight |
| Model 13 | .357 Magnum | All variants |
| Model 14 | .38 Special | K-38 Masterpiece |
| Model 15 | .38 Special | Combat Masterpiece |
| Model 16 | .32 Long / .32 H&R | K-32 Masterpiece |
| Model 17 | .22 LR | K-22 Masterpiece (rimfire) |
| Model 18 | .22 LR | Combat Masterpiece (rimfire) |
| Model 19 | .357 Magnum | Combat Magnum |
| Model 48 | .22 Magnum | K-22 Masterpiece MRF (rimfire) |
| Model 53 | .22 Jet | All variants |
| Model 64 | .38 Special | Stainless |
| Model 65 | .357 Magnum | Stainless |
| Model 66 | .357 Magnum | Combat Magnum Stainless |
| Model 67 | .38 Special | Stainless |
| Model 617 | .22 LR | Stainless (rimfire) |
| Model 648 | .22 Magnum | Stainless (rimfire) |
Main spring is interchangeable across all K Frame models regardless of caliber (centerfire and rimfire).
Installation Note
Installation requires removal of grip panels and sideplate. The main spring tension is regulated by the strain screw. Recommend installation by a qualified gunsmith to ensure proper function and safe trigger pull weight.