SQUARE WASHER Technical Specification Square Washers, Dimension/size: Standard. Can be offer as both Metric & Imperial Inch sizes with PTFE, XYLAN, ZINC, TEFLON, HOT DIPPED GALVANIZING etc. Size Range: M1 upto M100 & 0.0393\\\" upto 4\\\" with Customization. Fill the quantity to get latest price! Features A washer is a thin plate (typically disk-shaped, but sometimes square) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut. ... Washers often have an outer diameter (OD) about twice their inner diameter (ID), but this can vary quite widely. Features: - Dimensional accuracy - Corrosion resistance - Fine finish