5 1 Fe6 Lock Washer/Spring Washer Place of origin : China Lock washer, spring washer, single,double coil spring washers Material: 55si2Mn, 60si2Mn, spring steel bars wL20, WL24, Wl22 Rockwell hardness 42-50 Spring washer is usually supplied in natural... Kunshan Alex Railway Fastening Co.,Ltd See all results Browse Related Rail Clip U Nut