The NO2 C-slotted impact driver bit is a single No.2 slotted tip bit designed for use with impact drivers and quick-change bit holders to drive or remove slotted (flathead) screws in heavy-duty and repetitive applications. Its primary use is where a robust, impact-rated slotted tip is required to withstand high torque and shock loads from cordless impact drivers, pneumatic drivers or hand-held impact tools.

Manufactured from S2 tool steel and hardened and tempered to a typical tip hardness of HRC 58–62, the bit offers the torsional strength needed for impact applications. The shank is a 6.35 mm (1/4") hex for compatibility with 1/4" quick-change chucks and magnetic bit holders; shank dimensions conform to DIN 3126 (C 6.3) and ISO 1173 interchange standards. The working end is finished with a black phosphate/black oxide coating to provide basic corrosion resistance and to reduce surface wear. The C-slotted head profile is formed to tight tip tolerances to minimise cam‑out and to give positive engagement with the screw slot under impact loads. There are no threaded elements on the bit itself.

Typical applications include maintenance and repair, carpentry and joinery, electrical and plumbing installations where traditional slotted screws are still used, and industrial assembly or dismantling where impact tools speed up the work. Trades that commonly use this style of bit include electricians, joiners, HVAC engineers and vehicle technicians who encounter slotted fasteners on brackets, faceplates, terminal blocks and older machinery.

Key benefits of the NO2 C-slotted impact bit are its high torsional strength from S2 tool steel and the hardened tip that resists mushrooming and wear under repeated impacts, the corrosion resistance offered by the black phosphate finish, and its dimensional compatibility with standard 1/4" hex holders and impact driver chucks. The C‑slot geometry helps maintain contact with the screw head, reducing slippage and damage to both screw and bit.

Duchy Fasteners holds a practical stock range of screwdriver bits and impact driver bits, including slotted sizes and pack options suitable for trades and industry; please contact us for available sizes, pack quantities and trade pricing.