18-8 / 304 Grade Stainless Steel Solar Split Ring Lock Washers.

• These are Medium Profile Solar Munting Spring Lock Washers.
• Solar Bracket Split Ring Lock Washers are Commonly Used With a Varity of Fasteners Including Bolts, Screws, and Nuts.  
• Made of 18-8 / 304 Grade Stainless Steel.
• These are the Most Popular Variety of a Spring Washer for Many Solar Mount Production Applications.