DeWalt 605256-01 Chuck Screw (1/4"-28 UNF Left-Hand) – Genuine OEM Replacement Drill Chuck Retaining Screw

Part Number: 605256-01
Category: Power Tool Parts & Accessories → Drill Parts → Chuck Screws
Type: DeWalt 605256-01 Chuck Screw (1/4"-28 UNF Left-Hand) – Genuine OEM Replacement Drill Chuck Retaining Screw

The DeWalt 605256-01 Chuck Screw is a genuine OEM replacement retaining screw designed to secure the drill chuck to the spindle on compatible DeWalt cordless and corded drills. Featuring 1/4"-28 UNF left-hand threads, this hardened steel screw installs inside the chuck and prevents it from loosening during forward drilling and reverse operation. Manufactured to original equipment specifications, it provides a direct-fit replacement for stripped, damaged, or missing chuck retaining screws, helping restore safe and reliable drill operation. The screw features a T20 Torx drive and comes with factory-applied thread-locking compound for secure installation.

Key Features & Benefits

• Part Number: 605256-01
• Genuine OEM DeWalt replacement part
• Replacement drill chuck retaining screw
• 1/4"-28 UNF left-hand thread
• T20 Torx drive
• Factory-applied thread-locking compound
• Hardened steel construction
• Helps securely retain the drill chuck
• Direct-fit OEM replacement
• Manufactured to original equipment specifications

Technical Specifications

Part Number: 605256-01

Manufacturer: DeWalt

Product Type: Chuck Retaining Screw

Thread Size: 1/4"-28 UNF

Thread Direction: Left-Hand (Reverse Thread)

Drive Type: T20 Torx

Material: Hardened Steel

OEM Part: Yes

Compatible Applications

The DeWalt 605256-01 Chuck Screw is used on numerous compatible DeWalt, Black & Decker, Craftsman, and select other drills utilizing OEM part number 605256-01. Common compatible tool categories include:

• Cordless Drills
• Hammer Drills
• Drill/Drivers
• Corded Drills

Always verify your tool model, type number, and original part number before ordering to ensure proper compatibility.

Function of the Chuck Screw

The DeWalt 605256-01 Chuck Screw is installed inside the drill chuck and helps to:

• Secure the chuck to the spindle
• Prevent the chuck from loosening during use
• Maintain proper chuck alignment
• Support safe forward and reverse drilling operation
• Restore the drill's original retaining system

Its left-hand (reverse) thread is specifically designed to resist loosening as the drill rotates during normal operation.

Common Signs Replacement Is Needed

Replace the chuck screw if you notice:

• Missing retaining screw
• Stripped Torx drive
• Damaged or worn threads
• Chuck loosening during operation
• Corrosion or excessive wear
• Difficulty securing the chuck

A damaged or missing chuck screw can allow the chuck to loosen from the spindle, reducing drilling accuracy and potentially causing unsafe operation.

Installation & Service Notes

Disconnect the drill from its power source or remove the battery before performing repairs.

Open the chuck jaws fully to access the retaining screw inside the chuck. Remove the old screw by turning it clockwise, since it uses left-hand threads. After installing or servicing the chuck, apply the replacement 605256-01 Chuck Screw and tighten it by turning counterclockwise until securely seated. The factory-applied thread-locking compound helps prevent loosening during use. Reassemble the drill and verify that the chuck operates smoothly before returning the tool to service.

Important: Always verify your tool model and original part number before ordering. Because this is a left-hand threaded screw, tightening and loosening directions are opposite those of standard screws. Use genuine OEM DeWalt replacement parts to ensure proper fit, safe operation, and long-term reliability.

Maintenance Recommendations

• Inspect the chuck retaining screw whenever servicing the chuck.
• Use the correct T20 Torx driver to prevent stripping the screw head.
• Do not substitute a standard right-hand threaded screw.
• Replace damaged or missing retaining screws promptly.
• Inspect the chuck and spindle threads during service.
• Use genuine OEM replacement parts to maintain factory fit, secure chuck retention, and long-term drill performance.