3 holes with 2 edm slots; no flaw, 0.2mm flaw, 0.5mm flaw; 4.0mm diameter holes
NSN 5999-01-327-3067
NSN 5915-01-199-1708
NSN 5960-01-323-6432
NSN 5925-00-377-6368
NSN 5985-01-474-5141
NSN 5950-01-192-8067
NSN 6145-01-008-3166
NSN 5965-00-791-0964
NSN 5975-00-900-0438
NSN 5975-01-458-9536
NSN 6105-01-166-7385
NSN 7035-00-481-5182