SPEC, Belleville Spring Washer, 0.375 For Rod Size, Disc Spring - 22RE14|B1125053S - Grainger
SPEC, Curved Spring Washer, 0.437 For Rod Size, Disc Spring - 22RJ92|U4370120 - Grainger
Assembly How-To Spirol
Amazon.com: LF&LQEW 30pcs 60Si2MnA Belleville Compression Spring Washer Disc Spring Outer Dia 8/10/12.5mm Inner Dia 4.2-6.2mm Thickness 0.2-0.7mm (Size : 12.5 x 6.2 x 0.5mm) : Industrial & Scientific
Gardner Spring - Belleville Disc Spring: 0.63" ID, 0.111" OAH, 1.25" OD - 87779450 - MSC Industrial Supply