M5 x .8 Serrated Flange Lock Nut DIN 6923 A2 Stainless Steel M5-.08 serrated flange lock nut din 6923 a2 s/s XMSFN5 $0.081/ea
M5 x .8 Nylon Insert Lock Nut A2 Stainless Steel DIN 985 M5-.08 nylon insert lock nut din 985 a2 s/s XMNLN5 $0.050/ea
M5 x .80 Acorn (Cap) Nut A2 Stainless Steel M5-.80 acorn (cap) nut a2 stainless din 1587 XMAN5 $0.090/ea