Smith & Wesson Old Style Front Square Tang Sight Mounting Screw K L N Frame 037350000
$7.99
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Smith & Wesson Old Style Front Square Tang Sight Mounting Screw K L N Frame 037350000
$7.99
Smith & Wesson Old Style Front Square Tang Sight Mounting Screw – Part 037350000
Genuine OEM Factory Part | Old Style Design | Pre-1994 Production Era
This is the authentic Smith & Wesson factory mounting screw for the old style front square tang adjustable rear sight used on K, L, and N Frame revolvers. S&W transitioned away from the old style square tang sight design circa 1994, replacing it with a revised sight and screw configuration. If your revolver was manufactured before approximately 1994 and features the original square tang front sight base, this is the correct screw.
🔍 Quick Identification – Don't Know Your Dash Number?
Look at the front end of the rear sight leaf (where this screw installs):
- ✅ Square/Flat End – This is the old style. This screw fits.
- ❌ Rounded/Curved End – This is the new style. A different, shorter screw is required.
⚠ Transition Year Note: S&W sometimes used remaining old-style parts during the transition years (1993–1995). Always visually confirm whether the sight leaf end is square or rounded before ordering, regardless of dash number.
Compatibility – Full Model & Dash Number Chart
⚠ Important: This screw fits revolvers with the old style front square tang adjustable sight. Use the dash number chart below to confirm compatibility. Verify your revolver's dash number via the serial number and factory records before ordering.
K Frame (Medium Frame) – Verified Dash Number Cutoffs
These models have confirmed old style / new style transition points. Any dash number at or before the cutoff uses this screw.
| Model | Compatible Dash Numbers (Old Style) | New Style Switch – Do Not Use |
|---|---|---|
| Model 14 – .38 Special (K-38 Masterpiece) | No dash through 14- 6 | 14-7 (1994) |
| Model 15 – .38 Special (Combat Masterpiece) | No dash through 15-6 | 15-7 (1994) |
| Model 17 – .22 LR (K-22 Masterpiece) ⚠ Rimfire | No dash through 17-6 | 17-7 (1994) |
| Model 18 – .22 LR (Combat Masterpiece) ⚠ Rimfire | No dash through 18-4 | Discontinued |
| Model 19 – .357 Magnum (Combat Magnum) | No dash through 19-6 | 19-7 (1994) |
| Model 48 – .22 Magnum ⚠ Rimfire | No dash through 48-4 | 48-5 (1994) |
| Model 66 – .357 Magnum (stainless Combat Magnum) | No dash through 66-3 | 66-4 (1994) |
| Model 617 – .22 LR (stainless) ⚠ Rimfire | No dash | 617-1 (1994) |
K Frame – Additional Compatible Models (Verify Sight Type)
These models were produced primarily before 1994 and are generally compatible, but exact dash-level cutoff data is unverified. Use the Quick Identification method above to confirm your sight leaf is square/flat before ordering.
L Frame (Large Frame) – Verified Dash Number Cutoffs
The L Frame was introduced in 1980, so fewer dash numbers fall within the old style era.
| Model | Compatible Dash Numbers (Old Style) | New Style Switch – Do Not Use |
|---|---|---|
| Model 586 – .357 Magnum (blued, adjustable sight) | No dash through 586-4 | 586-5 (1994) |
| Model 686 – .357 Magnum (stainless, adjustable sight) | No dash through 686-3 | 686-4 (1994) |
N Frame (Extra Large Frame) – Verified Dash Number Cutoffs
Heavy-duty revolvers. The sight transition occurred at the dash numbers listed below.
| Model | Compatible Dash Numbers (Old Style) | New Style Switch – Do Not Use |
|---|---|---|
| Model 25 – .45 ACP / .45 Colt | No dash through 25-8 | 25-9 (1994) |
| Model 27 – .357 Magnum | No dash through 27-5 | 27-6 (1994) |
| Model 29 – .44 Magnum | No dash through 29-5 | 29-6 (1994) |
| Model 57 – .41 Magnum | No dash through 57-2 | 57-3 (1994) |
| Model 624 – .44 Special (stainless, limited run) | No dash | N/A |
| Model 625 – .45 ACP (stainless) | 625-2, 625-3, 625-4 | 625-5 (1994) |
| Model 627 – .357 Magnum (stainless) | No dash through 627-1 | 627-2 (1994) |
| Model 629 – .44 Magnum (stainless) | No dash through 629-3 | 629-4 (1994) |
| Model 657 – .41 Magnum (stainless) | No dash through 657-3 | 657-4 (1994) |
Product Specifications
- Part Number: 037350000
- Manufacturer: Smith & Wesson
- Condition: Factory New – Genuine OEM
- Material: Steel
- Finish: Factory specification
- Sight Type: Old style front square tang adjustable rear sight
- Production Era: Pre-1994 revolvers
- Country of Origin: United States
Why Genuine OEM Matters
- Exact thread pitch and head geometry – no risk of cross-threading or sight drift
- Correct torque retention under recoil
- Preserves collector and resale value of vintage revolvers
- Manufactured to the same spec as the original factory part
Installation Notes
This screw secures the front square tang of the adjustable rear sight assembly to the revolver frame. Use the correct flat-blade screwdriver bit sized to the slot to avoid marring. Apply a minimal amount of thread-locking compound if the screw has a history of loosening. Verify sight zero after installation. Professional gunsmith installation recommended if unfamiliar with S&W sight systems.
In Stock & Ready to Ship | Genuine S&W OEM Part | Expert Support Available