... and Spring washer Monel 400 K500 2.Standard: GB, ISO, DIN, BS, ANSI/ASME, JIS 3,Size: M6-M100(1/4 ... , hastelloy, monel, nimonic etc. 5. Grade: 4-10, A2, A4, A2-70, A4-80. 6. Hardness limit: 100HV~370 HV 7ISO 9001:2008 ... supply? 1Namecarbon steel washer,tapper washer2.standardUSS,SAE,FENDER, F436,DIN ( 125A, 126, 436, 440, 7349, 7989, 9021),BA,NFE,JIS ...