49MM ID X 78MM OD CONICAL SEAT WASHER TYPE D PER DIN 6319 STEEL CASE HARDENED TO A DEPTH 0.2-0.4 MM HARDNESS (550+100) HV 10 FINISH ZINC CLEAR CHROMATE, 5 MICRONS PER ISO 4042, GRADE A2B MATERIAL TEST REPORT REQUIRED. QUOTE QUANTITY 100, 200, 300 AND 500 PIECES.