This document specifies an inspection procedure to be used by the purchaser where no prior agreement exists. It also specifies a reference acceptance procedure for acceptance or rejection of an inspection lot, when no agreement can be reached between the purchaser and the supplier, or where conformance to specification is disputed. It applies to inspection lots of bolts, screws, studs, nuts, pins, washers, rivets and other related fasteners. This document applies to fasteners not intended for high volume machine assembly, special-purpose applications or specially engineered applications requiring more advanced in-process control and lot traceability. For in-process control or final inspection by the manufacture and sorting, see ISO 16426.