Fasteners
Hexagonal-head fasteners
Screws (bolts)
Self-tapping screws
Thread pitch
External-thread fasteners
Dimensional tolerances
Drilling
Threaded fasteners
Designations
Dimensions
Threads
Washers
Link: BS EN ISO 15480:2019 Fasteners. Hexagon washer head drilling screws with tapping screw thread
Source: BSI Standards
