Smith & Wesson L Frame Model 586 Strain Screw - Round Butt Blue Steel - Used OEM 586172

This listing is for the strain screw only.

Genuine Smith & Wesson OEM strain screw for the L Frame Model 586 revolver with round butt grips, chambered in .357 Magnum. Blue steel finish. The strain screw tensions the mainspring at the bottom of the grip frame, directly affecting trigger pull weight and hammer reliability. Used, original factory part in good working condition — threads clean and functional, no stripping or damage.

Part Details:

• Part Number: 586172
• Frame: L Frame
• Grip Style: Round Butt
• Finish: Blue Steel
• Condition: Used OEM

Model Compatibility:

• Smith & Wesson L Frame Model 586 (.357 Magnum) — Round Butt configuration

Important: This screw is for round butt grip frames only — not compatible with square butt Model 586 variants. Strain screw tension directly affects trigger pull weight: tightening increases pull weight, loosening decreases it. Proper adjustment requires knowledge of mainspring function. Professional installation by a qualified gunsmith is recommended.

We specialize in new, used, and new old stock Smith & Wesson double action revolver parts. Questions about compatibility? Shoot us an email or give us a call — we're happy to help.