This International Standard specifies two series of prism angles from 120°to 0°30′and a series of prism slopes from 1:10 to 1:500, for general mechanical engineering purposes.
BS EN ISO 2538:2003 history
2014BS EN ISO 2538-1:2014 Geometrical product specifications (GPS). Wedges. Series of angles and slopes
2004BS EN ISO 2538:2003 Geometrical product specifications (GPS) - Series of angles and slopes on prisms