Smith & Wesson Model 625 Mainspring & Strain Screw - N Frame .45 ACP Performance Center - Used OEM Part N424

Smith & Wesson N Frame Model 625 Mainspring & Strain Screw

Part Number: N424
Condition: Used - Excellent
Frame: N Frame
Model: 625 (Jerry Miculek Performance Center version)
Caliber: .45 ACP
Finish: Black
Weight: 1 oz

Product Details

Genuine Smith & Wesson factory mainspring and strain screw assembly, removed from an N Frame Model 625 revolver in .45 ACP. This is the Jerry Miculek Performance Center version. The mainspring controls hammer tension and directly affects trigger pull weight and smoothness, while the strain screw lets you fine-tune that tension.

What's Included

• 1 x Mainspring (hammer spring)
• 1 x Strain screw

Model Compatibility Chart

Fitment beyond the models listed above is not verified. If your revolver is not on this chart, contact us with your model and serial number before ordering.

Function

The mainspring provides the force that drives the hammer forward to strike the firing pin. The strain screw adjusts mainspring tension, which lets you balance trigger pull weight against reliable primer ignition.

About the Model 625

The Model 625 is a large N Frame revolver chambered in .45 ACP that uses moon clips for rapid reloading. It is popular in USPSA and ICORE revolver divisions for its accuracy and smooth double-action trigger.

How to Identify Your S&W Model

Swing out the cylinder and check behind the yoke on the frame for the stamped model number. Model numbers began in 1957-58, so a revolver with no model number may be pre-1957. Contact us with your serial number if you need help identifying the right part.

Installation Notes

• Professional gunsmith installation strongly recommended
• Requires disassembly of the grip frame and internal components
• Strain screw adjustment affects trigger pull weight
• Factory OEM part made to S&W specifications
• Used part removed from a functioning Performance Center revolver
• May require fitting by a qualified gunsmith

Questions?

We specialize in Smith & Wesson pistol and revolver parts - used, new old stock, refurbished, and new. Email sales@usagunsandgear.com or call 770-544-8075.