Smith & Wesson K Frame Model 10-7 Main Spring Old Style Used Part 10141A
$5.99
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Smith & Wesson K Frame Model 10-7 Main Spring Old Style Used Part 10141A
$5.99
Smith & Wesson K Frame Model 10-7 Main Spring — Old Style | Used | Part #10141A
Factory OEM main spring (hammer spring) for Smith & Wesson K Frame Model 10-7 revolvers, old style design. This coil spring provides the force that drives the hammer forward to strike the firing pin and ignite the primer — essential for reliable ignition with every 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: 10141A
- Frame: K Frame
- Model: Model 10-7
- Caliber: .38 Special
- Design: Old Style
- Component: Main Spring (Hammer Spring)
- Material: Steel
- Condition: Used / Factory Original OEM
Model Compatibility Chart
| Model | Dash | Caliber | Notes |
|---|---|---|---|
| Model 10 | 10-7 | .38 Special | Old style main spring; verify dash number before ordering |
This main spring is specific to the Model 10-7 dash variant. Spring dimensions and coil count can vary between dash numbers and production runs. Verify your revolver’s dash number (stamped on the frame under the cylinder crane) before ordering.
Function
The main spring (hammer spring) is compressed when the hammer is cocked and releases its stored energy to drive the hammer forward when the trigger is pulled. Proper spring tension is critical for reliable primer ignition — a worn or weakened spring causes light primer strikes and misfires. Spring tension is regulated by the strain screw at the base of the grip frame.
Installation Note
Installation requires removal of grip panels and sideplate. Spring tension is adjusted via the strain screw. Gunsmith installation recommended to verify proper trigger pull weight and reliable ignition after replacement.