Specification for self-tapping screws and metallic drive screws Ingestion-build-84997 Contents for BS EN 15221-2

Contents for BS EN 15221-2 includes:

with explanatory flow diagrams

before explaining the purity criteria in depth

Hardness testing

Manufacturers of railway vehicles

Specification for self-tapping screws and metallic drive screws Ingestion-build-84997 Contents for BS EN 15221-2What is BS 4174 Self tapping screws and metallic drive screws about? BS 4174 focuses on ferrous and non ferrous tapping screws and metallic drive screws. Provisions are made for two classes of tapping screw, namely thread forming and thread cutting, each available in several types which are described and illustrated in BS 4174. BS 4174 provides general dimensions for countersunk, raised countersunk, and pan head tapping screws with slotted or recessed