Smith & Wesson K Frame Strain Screw Square Butt Factory New OEM Part 05064B000
$6.99
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Smith & Wesson K Frame Strain Screw Square Butt Factory New OEM Part 05064B000
$6.99
This listing is for the Smith & Wesson K Frame Strain Screw, Square Butt, Blue Steel (Factory New OEM Part 05064B000) only.
Genuine Smith & Wesson factory new OEM strain screw for K Frame revolvers with square butt grips. The strain screw is a critical internal component that secures the mainspring in the grip frame, directly affecting trigger pull weight and reliability. Adjusting the number of turns is a common K Frame trigger tuning technique — reducing turns decreases mainspring tension (lighter pull); adding turns increases it.
Part Details
- Part Number: 05064B000
- Condition: Factory New OEM
- Manufacturer: Smith & Wesson
- Finish: Blue Steel
- Grip Style: Square Butt
- Frame: K Frame
Model Compatibility
| Make | Model | Caliber | Butt | Compatible |
|---|---|---|---|---|
| Smith & Wesson | Model 10 | .38 Special | Square Butt | ✓ Yes |
| Smith & Wesson | Model 13 | .357 Magnum | Square Butt | ✓ Yes |
| Smith & Wesson | Model 14 | .38 Special | Square Butt | ✓ Yes |
| Smith & Wesson | Model 15 | .38 Special | Square Butt | ✓ Yes |
| Smith & Wesson | Model 17 | .22 LR | Square Butt | ✓ Yes |
| Smith & Wesson | Model 18 | .22 LR | Square Butt | ✓ Yes |
| Smith & Wesson | Model 19 | .357 Magnum | Square Butt | ✓ Yes |
| Smith & Wesson | Model 48 | .22 WMR | Square Butt | ✓ Yes |
| Smith & Wesson | Model 64 | .38 Special | Square Butt | ✓ Yes |
| Smith & Wesson | Model 65 | .357 Magnum | Square Butt | ✓ Yes |
| Smith & Wesson | Model 66 | .357 Magnum | Square Butt | ✓ Yes |
| Smith & Wesson | Model 67 | .38 Special | Square Butt | ✓ Yes |
| Smith & Wesson | Model 617 | .22 LR | Square Butt | ✓ Yes |
| Smith & Wesson | K Frame Round Butt models | Any | Round Butt | ✗ No — requires round butt strain screw |
Not compatible with K Frame round butt models. To identify your butt style, check the grip frame shape at the bottom — square butt frames have a flat, squared-off base. Contact us with fitment questions.
Installation Note
Strain screw replacement is accessible from the base of the grip frame after removing the grip panels. No action disassembly required. Function test after installation.
We only ship to addresses within the United States.