DS DS/EN ISO 8742
DS DSEN SO 8742 1998-FEB-11 Grooved pns - One-thrd-length centre grooved
This international standard specifies the characteristics of third-length centre grooved pins made of steel or austenitic stainless steel which have three equally spaced grooves impressed longitudinally on their exterior surface, with nominal diameter, d1, from 1,5 mm to 25 mm inclusive.