Bits for internal hexagon socket screws
Tough Wera 840/4 Z bits are designed for working with internal hexagon (hex) screws. The product is designated by the manufacturer WERA as part of the 840/4 Z series and is intended for general/”universal” use, with a particular focus on increased durability in difficult materials.What it does
Tough Wera 840/4 Z bits transmit torque to internal hexagon screws using WERA's Hex-Plus profile. The Hex-Plus profile increases the contact surfaces between the bit and the screw head by engaging the flanks rather than the corners, which reduces the risk of nicks and rounding in the screw recess.
How it is typically used
These bits are relevant when driving screws with standard hexagon screw heads and desiring improved contact between the tool and screw, as well as increased resistance to breakage at the tip when working with hard materials. The 840/4 Z series has a 1/4" hexagon drive in Wera Connecting Series 4 and is specified with a blade length of 50 mm.
Typical applications
- Universal screwdriving with internal hexagon (hex) screws, as stated by the manufacturer.
- Applications where increased bit durability in harder materials is desirable, cf. the manufacturer's description of "tough" bits.
Specifications
- Product name: Tough Wera 840/4 Z bits.
- Drive profile: Hex-Plus (larger contact surfaces in the screw head).
- Design: Bits for internal hexagon (hex) screws.
- Construction: Described by the manufacturer as "tough" for working in hard materials.
- Drive size: 1/4" hexagon drive (Wera connecting series 4).
- Blade length: 50 mm (specified as blade length entry for the series).
- Manufacturer's part number: 05135099001 (listed on WERA product page for 840/4 Z bits).
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