This standard BS ISO 15636:2003 Back-up pads for vulcanized fibre discs is classified in these ICS categories:
25.100.70 Abrasives
This International Standard specifies the design and dimensions of back-up pads intended for the fixing or clamping of vulcanized fibre discs in accordance with ISO 16057, or comparable grinding tools on hand-held grinding machines, e.g. angle grinders.
The connecting dimensions of support discs and clamping units are matched for spindle ends with the common practice of this kind of hand-held machine.