Disc spring, well know by Belleville Washers.

Manufactured to DIN 2093 standard and non-standard.

Material: 50CrV4/60Si2Mn/X 10 CrNi 18-8/X 7 CrNiAl 17 7/X 5 CrNiMo 17 12 2/X 22 CrMoV 12 1/X 39 CrMo 17-1/CuSn 8/CuBe 2/NIMONIC 90/INCONEL X 750/INCONEL 718/INCONEL625 Etc.