supply of fs all steel nut lock nut m20 - property class 10. , fs all steel nut lock nut m20 - property class 10. note:-1 - zinc flake coating (geom et321 or equivalent) with top coat, without any hexavalent chromium without any integrated or separately added lubricant. minimum salt spray test life of 1000 hours is to be ensured. 2- fs all steel lock nuts, dimen sions of nut shall be as per din 6925/ din 980m. nut shall be of make m/s flaig hommel gmbh germany special condition: suitable packing done to prevent damage during transit, unloading and rust prevention d uring storage. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]