Appendix N - Suspect Counterfiet Parts.pdf

This document is a Suspect Counterfeit Parts Headmarks List from the U.S. Department of Energy's Southwestern Power Administration. The document provides a comprehensive list of Grade 5, Grade 8, Grade 8.2, and A325 fasteners of foreign origin that are suspected to be counterfeit, focusing on specific manufacturers' headmarks from Japan, Canada, and Taiwan. The list includes manufacturers such as Jim Her (TW), Kosaka Kogyo (JP), Asahi Mfg. (JP), Nippon Fasteners (JP), Hinomoto Metal (JP), and others, with their corresponding identifying marks.

The document warns that any bolt on the list should be treated as defective without further testing, and it provides guidance for identifying potentially problematic circuit breakers. The headmarkings are usually raised and sometimes indented, with a key indicating the country of origin (CA-Canada, JP-Japan, TW-Taiwan, YU-Yugoslavia). The list specifically highlights fasteners from the Bennett Denver Target and provides detailed information about the manufacturers and their specific grade markings to help identify suspect counterfeit parts.