Product Overview
The Wera 840/4 Z Tamper-proof Hex-Plus BO bit (05059644001) is a 1/4" hexagon-drive bit designed for hexagon-socket screws with a security pin (BO = with bore hole). The bit uses Wera's Hex-Plus profile, which increases the contact area between the bit and the screw, reducing damage and notching of the screw head. The product is classified as a "tough" (zähhart) Z-bit for use with harder materials and connects via Wera connecting series 4 (1/4" drive).Function and Construction
The bit is designed to grip the surfaces within a hexagon-socket rather than just the corners, which is the core of the Hex-Plus profile. The Wera 840/4 Z Tamper-proof Hex-Plus BO bit has a bore hole in the tip (BO) to fit screws with a central security pin. It is specified with a tip size of 5.0 mm and a blade length of 89 mm.- Hex-Plus profile — increased contact area for reduced risk of damage to the screw head.
- BO (bore hole) — for screws with security pin.
- Tough (zähhart) Z-bit — designated by the manufacturer for harder materials.
- 1/4" hexagon-drive (Wera connecting series 4) — intended for standard 1/4" holders.
Typical Applications
The bit is used for tightening and loosening hexagon-socket screws with a security pin, where the Hex-Plus profile is desired to minimize damage to the screw head. It is intended for universal use with holders that comply with DIN ISO 1173-F 6.3.Specifications
- Manufacturer: WERA
- Manufacturer's part number: 05059644001
- Product name: Wera 840/4 Z Tamper-proof Hex-Plus BO bit
- Drive: 1/4" hexagon-drive (Wera connecting series 4)
- Tip size: 5.0 mm
- Blade length: 89 mm
- Profile: Hex-Plus
- Type: Tamper-proof BO (with bore hole) for hexagon socket screws with security pin
- Classification: Tough (zähhart) Z-bit
- Suitable for holders: DIN ISO 1173-F 6.3
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