Product Name: Spherical Spring Lock Washer DIN74361c Model NO.: din74361c Spring Washer Type: Standard Combination Washer Packaging: All Inclusive Combination Washer Structure: B Type Material: Carbon Steel Type: Spring Washer Trademark: ruitan Transport Package: Bulk or Carton Specification: Spherical Washer Origin: Wenzhou Product Description Spherical lock washer: This kind of washer on the pic is made according to drawing or standard DIN74361C. We can produce from the size that buyer need. The Material of it on the PC is steel the material can be stainless lteel, steel or copper. We can make according to buyer's drawings or samples or standard. At the bottom of it, it like the ball which is smaller than the top,