There are several DIN standards each with an equivalent, but not identical, ISO standard. The difference is that the DIN standards give the nominal length without the radiused ends, whereas the ISO standards consider the nominal length to be the total length.
• DIN 1471 (GP1) Similar to ISO 8744 - Full length taper grooves used to fix two or more components together, but with less insertion force than DIN 1473
• DIN 1472 (GP2) Similar to ISO 8745 - Half length taper grooves used where part of the assembly must be a free fit
• DIN 1473 (GP3) Similar to ISO 8740 - Full length parallel grooves used to fix two or more components together with maximum rigidity
• DIN 1474 (GP4) Similar to ISO 8741 - Half length reverse taper grooves used where the ungrooved portion acts as a stop or handle
• DIN 1475 (GP8) Similar to ISO 8742 - Third length centre grooves used on hinges or clevises where the two ends must act as a pivot
• Mild Steel
• Stainless Steel A2 (WS 1.4305)