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wera_05059641001
wera_05059641001
wera_05059641001
wera_05059641001
wera_05059641001
wera_05059641001

WERA 840/4 Z Hex-Plus BO hexagonal BO bits with bore, 2.5 x 89 mm - 05059641001

Supplier number: WERA 05059641001 | EAN 4013288094308
Recommended Retail Price €21.24
9.40 tax incl.
€7.77 excl. VAT (incl. all environmental contributions)
On order: delivered from 05/10/2026

  • Ordered before 20:00 - delivered as of 05/10/2026
  • Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
  • Delivery by DHL

Precision fastening with Wera

Practical benefits
  • Prevents rounded screw heads: The specialized Hex-Plus geometry provides larger contact surfaces to keep you from stripping socket screws.
  • Access to security fasteners: Featuring a centered bore hole, this bit lets you effortlessly drive tamper-proof hexagon screws.
  • Extended reach for deep screws: With an overall length of 89 mm, you easily reach fasteners in recessed spaces.

In a nutshell

The right choise for

With the Wera 840/4 z Hex-Plus bo bit, you can fasten and remove tamper-resistant hexagon socket screws with complete confidence. The centered bore hole allows this 2.5 mm bit to fit security screws with a safety pin, while the Hex-Plus geometry increases the contact surface in the screw head to prevent stripping. Featuring an extended length of 89 mm, it gives you easy access to deeply recessed fasteners in tight housings. Fitted with a standard 1/4" hexagon drive, it connects directly into bit holders and machine chucks, making it the practical choice for maintenance on electronics and secure installations.



€9.40
tax incl.

Product information

Key features according to our expert

  • Length: 89 mm
  • Blade thickness: Not applicable
  • Type of drive profile (bit): Hexagon
  • Connection size (bit): 1/4"
  • VDE approved: No
  • Bit tip: HEX 2,5 mm
  • Drive profile size (bit): 2,5 mm
  • Product Range: Wera Hex-Plus

Scope of delivery

  • 840/4 Z Tamper-proof Hex-Plus BO bits, 2.5 x 89 mm

Product description

Tough viscous Wera bits for hexagon socket screws for universal use. The Hex-Plus profile offers a greater contact surface in the head of the screw. The notching effect is therefore reduced to a minimum and damage to the screw head more or less eliminated. 1/4" hexagon, suitable for holders as per DIN ISO 1173-F 6.3. Hexagon socket BO screws have a protruding pin in their drive profile. This prevents any unauthorised loosening since the "normal" hex tools cannot move these screws. 1/4" hexagon, suitable for holders as per DIN ISO 1173-F 6.3.

  • For hexagon socket screws with safety pin (BO = with bore hole)
  • Hex-Plus allows socket head screws to live longer
  • Tough for hard materials
  • 1/4" hexagon drive (Wera connecting series 4)

Application

  • Hexagon socket screws with safety pin (BO = with bore hole)

Drive

  • 1/4" hexagon, suitable for DIN ISO 1173-F 6.3 bit holders

Design

  • Hex-Plus with bore hole, tough, for universal use

Features and benefits

  • For hexagon socket screws with safety pin.
  • Hexagon socket screws are a problem, because the contact surfaces that transfer the force of the tool to the screw are very narrow. The consequence: the head of the screw can be damaged, usually rounding out the recess. Hex-Plus tools have larger contact surfaces to prevent this, driving from the flats of the recess, rather than the corners. Good to know: Hex-Plus tools fit into every standard hexagon socket screw!
  • Tough Wera bits prevent the tip from breaking prematurely. Z-bits usually are the bit for universal screwdriving applications.

All Features

Length
89 mm
Blade thickness
Not applicable
Type of drive profile (bit)
Hexagon
Connection size (bit)
1/4"
Vde approved
No
Bit tip
HEX 2,5 mm
Drive profile size (bit)
2,5 mm
Product range
Wera Hex-Plus
  • Brand WERA
  • EAN 4013288094308
  • Supplier number WERA 05059641001

Frequently asked questions about this product

Answered by specialists
What is the purpose of the bore hole (BO) in this bit?
The bore hole (BO) accommodates the safety pin in tamper-proof hexagon socket screws, allowing you to drive security fasteners.
What is the advantage of the Hex-Plus profile?
Hex-Plus provides larger contact surfaces inside the screw head, reducing notch effect and preventing damage or stripping of screws.
What drive size does this bit use?
It features a standard 1/4" hexagon drive (Wera connecting series 4 / DIN ISO 1173-F 6.3) suitable for bit holders and machine chucks.
What are the dimensions of this bit?
The bit has an overall length of 89 mm and a hex tip size of 2.5 mm.
Is this bit VDE-insulated for electrical work?
No, this bit is not VDE-certified and is not insulated for live electrical work.
Questions about this product?

Our product specialists are happy to help with any questions about this range. Call, email or chat with us!

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