Product Name: Fastener Spring Lock Washer Non-Standard Model NO.: HLD-WASHER02 Spring Washer Type: Standard Combination Washer Packaging: All Inclusive Combination Washer Structure: A Type Material: Steel Type: Lock Washer Trademark: ruitan Transport Package: Bulk or Carton Specification: M3-M36 Origin: Zhejiang Product Description Spring washer: This kind of washer on the pic is made unstandard. We can produce from the size M2-M42, the Material of it on the PC is steel it seems like the spring. The material can be stainless lteel, steel or copper. We can make according to buyer's drawings or samples or standard.