Smith & Wesson N Frame Model 29-2 Strain Screw for Square Butt - .44 Magnum 29173

Smith & Wesson Model 29-2 Strain Screw for Square Butt

Genuine Smith & Wesson factory strain screw designed specifically for square butt N Frame Model 29-2 revolvers. The strain screw is a critical component that adjusts mainspring tension, directly affecting trigger pull weight and hammer strike force. This screw threads into the bottom of the grip frame on square butt models, allowing precise tuning of the revolver's action.

Key Features:

• Factory S&W strain screw in used condition
• Designed for square butt grip frames
• Adjusts mainspring tension
• Controls trigger pull weight and hammer strike
• Precision-threaded to factory specifications
• Ideal for restoration or replacement projects

Compatibility:

Designed specifically for Smith & Wesson N Frame Model 29-2 revolvers with square butt grip frames chambered in .44 Magnum. Square butt and round butt frames use different strain screws - this screw is for square butt models only. Strain screws typically interchange across N Frame models of the same butt configuration.

Important Note: This strain screw is for square butt grip frames. It will NOT fit round butt models, which use a different strain screw design. Always verify your revolver's grip frame configuration before ordering.

Installation Notes:

Professional gunsmith installation recommended. While the strain screw is accessible from the bottom of the grip frame, proper adjustment requires expertise to achieve the correct balance between reliable ignition and acceptable trigger pull weight. Over-tightening can cause light primer strikes; under-tightening can result in heavy trigger pull. Some fitting may be necessary to ensure proper thread engagement and function.

Specifications:

• Part Number: 29173
• Model: 29-2
• Frame Size: N Frame (Large Frame)
• Grip Frame Type: Square Butt
• Caliber: .44 Magnum
• Part Type: Strain Screw
• Condition: Used
• Manufacturer: Smith & Wesson

About Square Butt vs Round Butt:

Smith & Wesson N Frame revolvers were produced with two grip frame configurations: square butt (larger, more traditional) and round butt (smaller, more concealable). The square butt provides more gripping surface and better recoil control, making it popular for full-size service and hunting revolvers. The strain screw design differs between these configurations, so parts are not interchangeable.