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 black finish unless otherwise specified. At the request of customer we offer:phosphate coated, electro-galvanized, cadmium plated, zinc plated