1.Spring-washer; 2.PLAIN&BLACK&WZP&YZP&BZP& ... drawings or samples;5.grade:4.8,6.8,false 8.0 ,true 8.0,8.8 and etc;6.material:carbon steel ... blue zinc plating,environmental galvanizing,hot-dig-galvanizing,etc;8.manufacture method:be made by cold-forming & ... treatment;10.our main products include flat washer,spring washer,metal washer,etc;11.competive price for ... we pay for the loss at once; Spring Washer