A close-coiled helical extension spring, with ends fastened together to form a circle, designed to impose compression stresses toward the center of the circle thus formed when uniformly expanded.
NSN 6685-01-199-5911
NSN 5905-00-224-8147
NSN 6685-00-143-4747
NSN 7035-01-659-9845
NSN 6130-01-467-1565
NSN 6620-00-897-7759
NSN 5975-00-529-3835
NSN 5910-00-817-3313
NSN 5935-01-157-7840
NSN 6145-00-926-7810
NSN 4140-00-034-5180
NSN 5945-00-578-9813