Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B

Smith & Wesson N Frame Model 1917 Strain Screw Square Butt .45 ACP — Used Part 1917174B

$12.99
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Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B
  • Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B
  • Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B
  • Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B
  • Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B
  • Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B
  • Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B
  • Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B
  • Smith & Wesson Smith & Wesson Revolver N Frame Model 1917 Strain Screw Square Butt D.A. .45 Used 1917174B Part 1917174B
Smith & Wesson N Frame Model 1917 Strain Screw Square Butt .45 ACP — Used Part 1917174B

Smith & Wesson N Frame Model 1917 Strain Screw Square Butt .45 ACP — Used Part 1917174B

$12.99

Smith & Wesson N Frame Model 1917 Strain Screw — Square Butt, Used OEM Part

Genuine used Smith & Wesson OEM strain screw for the N Frame Model 1917 revolver chambered in .45 ACP (D.A. .45). Square butt grip frame configuration. The strain screw threads into the bottom of the grip frame and tensions the mainspring, directly affecting trigger pull weight and hammer fall force. A rare and hard-to-find original factory part for this historic pre-model revolver — in excellent used condition with threads clean and functional.

Specifications

  • Part Number: 1917174B
  • Manufacturer: Smith & Wesson
  • Model: 1917 (N Frame, Pre-Model)
  • Part Type: Strain Screw
  • Grip Frame: Square Butt only
  • Caliber: .45 ACP (D.A. .45)
  • Frame Size: N Frame
  • Condition: Used — excellent condition, threads clean and functional

Model Compatibility Chart

Model Frame Caliber Grip Frame Compatibility
Model 1917 (square butt) N Frame .45 ACP / D.A. .45 Square Butt ✓ Compatible — listed model
Model 625 (.45 ACP, square butt) N Frame .45 ACP Square Butt ⚠ Verify fit — same frame/caliber/grip, modern model
Model 1917 (round butt variants) N Frame .45 ACP Round Butt ✗ Not compatible — square butt only
Model 27, 28 (.357 Magnum, square butt) N Frame .357 Magnum Square Butt ⚠ Verify fit — same frame/grip, different caliber
Model 29, 629 (.44 Magnum) N Frame .44 Magnum Various ⚠ Verify fit — same frame, different caliber
K Frame (all models) K Frame Various — ✗ Not compatible — different frame
L Frame (all models) L Frame Various — ✗ Not compatible — different frame

Important Notes

  • This listing is for the strain screw only. Mainspring, grip panels, and associated parts are sold separately.
  • This strain screw is specific to square butt N Frame grip frames. Verify your grip frame configuration before ordering.
  • The strain screw controls mainspring tension. Tightening increases spring tension (heavier trigger pull); loosening decreases it. Always verify safe hammer fall and reliable ignition after any adjustment.
  • The Model 1917 is a pre-model era revolver. Parts for this model are increasingly scarce — this is a genuine OEM factory part, not a reproduction.
  • This is a used part in excellent condition. Threads are clean and functional.
  • Professional gunsmith installation recommended for proper fit and function.

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