Screwdriver bit TORX T4, 1/4 inch C6.3, 25 mm, zinc phosphated, pack of 5 - Bahco 59S/T4

T4 is one of the small Torx sizes and demands an accurately made drive. Bit T4 from the 59S range is 25 mm long and sits on a 1/4 inch hex shank C 6.3 to DIN 3126 and ISO 1173. Delivery is a pack of 5 in a plastic box, intended for electronics and precision assembly, connectors, housing covers and small appliances.

Benefits in use

• Standardised 1/4 inch hex shank C 6.3 to DIN 3126 and ISO 1173, so the bit fits every bit holder, quick change chuck and bit ratchet with this seat.
• Drive profile T4 in 25 mm overall length, matched to electronics and precision assembly, connectors, housing covers and small appliances.
• High performance steel alloy, hardened for torque transfer rather than raw hardness, so the tip does not snap off under overload.
• Zinc phosphated surface raises friction in the screw head and protects the bit against corrosion in storage and transport.
• Supplied as a pack of 5 in a plastic box, which keeps the stock sorted and within reach at the workstation.

Applications

The bit is made for fastening work in trade, industry and workshop and covers electronics and precision assembly, connectors, housing covers and small appliances. It can be driven by hand through a bit holder just as well as in a cordless or air screwdriver.

Standards and notes

Drive to DIN 3126 form C and ISO 1173. The bits are not insulated, there is no VDE test to IEC 60900, so work on live parts is ruled out. The manufacturer states no dissipative version to IEC 61340-5-1 for this article.