Bit serie 4 unbrako 1/4; SW4,0x152mm

Product Overview

The Wera 840/4 Z Hex-Plus bit 05059634001 is a bit for internal hexagon (hex) screws. The product is specified as a 4.0 mm Hex-Plus bit with a blade length of 152 mm (6") and a 1/4" hexagon drive for tool holders.

Function and Design

This 840/4 Z Hex-Plus bit features a Hex-Plus profile, which increases the contact surface against the screw's flanks rather than its corners. According to manufacturer documentation, Hex-Plus reduces the cam-out effect, thereby protecting the screw recess from damage. The Z-version is indicated as a hard/tough variant intended for general screwing applications where the bit must withstand demanding stresses without premature tip breakage. The use of a 1/4" hexagon drive places the bit in Wera's connecting series 4, and the datasheet explicitly states that it is suitable for holders according to DIN ISO 1173-F 6.3.

Documentation

See datasheet from the manufacturer

Typical Applications

• For driving internal hexagon (hex) screws.
• General/universal screwing applications, as described for the Z-version in the manufacturer's documentation.

Specifications

• Manufacturer: WERA
• Product name / type: Wera 840/4 Z Hex-Plus bit 05059634001
• Host size (hex): 4.0 mm
• Blade length: 152 mm (6")
• Drive: 1/4" hexagon drive (Wera connecting series 4)
• Suitability: for internal hexagon (hex) screws
• Profile: Hex-Plus (larger contact surface to reduce cam-out)
• Variant: Z (tough / extra rigid as indicated by the manufacturer)
• Compatibility with holders: according to DIN ISO 1173-F 6.3

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