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 6135-00-203-9645
NSN 6105-01-282-6251
NSN 4140-01-038-7659
NSN 5945-00-400-3050
NSN 6150-01-497-6463
NSN 6240-01-580-2748
NSN 5835-01-647-6426
NSN 5960-01-552-0862
NSN 6220-00-898-2010
NSN 6610-00-159-1110
NSN 6220-01-473-4602
NSN 6685-00-964-5262