Countersinks for countersunk head screws with head configuration in accordance with ISO 7721 Ingestion-build-107062 made from vacuum-degassed steel grade

made from vacuum-degassed steel grade EA1N1 that is the most commonly used grade on European networks

you can efficiently manufacture high-quality fine-grain structural steels products

the new standard includes:

Steel fibre concrete manholes are not manufactured in the United Kingdom and so have been excluded from this part of BS 5911

Countersinks for countersunk head screws with head configuration in accordance with ISO 7721 Ingestion-build-107062 made from vacuum-degassed steel grade1 Scope This International Standard specifies the dimensions and designation of countersinks for countersunk head screws with a head configuration in accordance with ISO 7721. This International Standard is applicable to the following types of screws: slotted countersunk flat head screws according to ISO 2009; slotted countersunk raised head screws according to ISO 2010; slotted countersunk flat head tapping screws according to ISO 1482; slotted