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 7035-01-550-7297
NSN 5915-00-060-3294
NSN 5985-01-571-7959
NSN 5835-01-303-6563
NSN 6610-01-152-2821
NSN 5985-01-461-3113
NSN 6145-01-406-6602
NSN 5855-01-225-5855
NSN 4140-01-299-3357
NSN 5920-00-644-3285
NSN 6130-01-235-9103
NSN 5965-01-587-2366