Flange nut Bosch 1603340040

The Flange nut Bosch 1603340040 is a locking nut designed to clamp grinding discs with diameters from 115 mm up to 230 mm that were manufactured before 08/1990. Compatible with angle grinders, the nut provides secure fastening of abrasive discs and flanges and is made to fit Bosch tool interfaces for reliable operation.

Advantages

The flange nut is constructed from durable materials and finished in silver to resist corrosion. It offers a secure locking action for grinding discs, ensuring stable attachment during operation. Designed for compatibility with Bosch angle grinders and accessories, the nut helps maintain correct disc alignment and reduces the risk of loosening under load.

Suitable for

• Clamping grinding discs Ø 115–230 mm manufactured before 08/1990
• Repair or replacement of fastening components on Bosch angle grinders
• Workshop and site use where secure disc fastening is required

Key specifications

• Manufacturer: Bosch
• Model / MPN: 1603340040
• EAN: 3165140052078
• Compatible disc diameters: 115–230 mm (pre‑08/1990 discs)
• Application: Locking/flange nut for angle grinders

How to use

Fit the flange nut onto the grinder spindle according to the angle grinder manufacturer's instructions. Place the grinding disc and any required flanges onto the spindle, then thread the flange nut and tighten it to the specified torque or until the disc is firmly clamped. Always ensure the disc is correctly seated and the nut is properly tightened before operating the tool.

Usage recommendations

Use only undamaged discs and compatible flanges. Check the disc diameter and manufacturing date to confirm compatibility (115–230 mm, manufactured before 08/1990). Follow the angle grinder manufacturer's safety guidelines, wear appropriate personal protective equipment, and replace the flange nut if signs of wear or deformation appear.