Disston Company 504779 No. 3 Phillips Screwdriver Bit

Product Description

The DISSTON COMPANY 504779 is a No. 3 Phillips screwdriver bit built for trade and professional use in power drivers and impact tools. Machined from shock-resistant tool steel, this bit is engineered to handle the torque demands of heavy-duty fastening applications without cracking or deforming. The snub nose design shortens the tip profile, reducing wobble at the fastener head and improving bit-to-screw engagement. At 3.88 inches in length and 0.03 pounds, it fits standard 1/4-inch hex driver chucks found on most cordless and corded drill-drivers.

This No. 3 Phillips bit is suited for residential and commercial construction, HVAC equipment assembly, electrical panel work, and general mechanical maintenance where larger Phillips fasteners are common. The No. 3 designation makes it appropriate for larger machine screws and structural fasteners encountered in equipment installation and cabinetry work. It is a single-piece unit sold individually and is appropriate for any trade professional who keeps a bit set stocked in their service kit.

Key Features

• Shock-resistant tool steel construction for durability under impact driver loads
• Snub nose design reduces tip wobble and improves fastener engagement
• No. 3 Phillips tip for larger screws and structural fasteners
• Standard 1/4-inch hex shank for compatibility with common driver chucks
• Compact form factor at 3.88 inches overall length

Compatibility

Designed to fit standard 1/4-inch hex chuck drill-drivers, impact drivers, and screwgun bit holders that accept No. 3 Phillips screwdriver bits.

Installation Notes

Seat the hex shank fully into the driver chuck or bit holder before applying torque. When using with an impact driver, confirm the bit is rated for impact use to avoid premature failure. Replace the bit if the tip shows rounding or deformation, as a worn tip increases the risk of cam-out and fastener damage.