Helical split spring washers conform to GB/T 93-1987, GB/T 859, GB/T 7244 and DIN 127/128. Available in strength grades 4.8 and 8.8, they provide elastic tension under compression to help retain preload and reduce loosening from vibration.

Materials offered are carbon steel and stainless steel 304 (A2) / 316 (A4). Carbon steel finishes: black oxide, blue-white zinc and yellow zinc; stainless is supplied bright/plain. These washers are typically used with hex bolts and flat washers in machinery, steel structures, hardware brackets and outdoor installations. Confirm required size, grade and finish when ordering.