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 5945-01-575-0755
NSN 6130-01-097-6363
NSN 5990-01-442-3520
NSN 6150-00-189-0292
NSN 6620-01-162-8001
NSN 6145-01-415-6127
NSN 5985-00-806-8029
NSN 6110-01-313-9030
NSN 5895-01-625-5963
NSN 6135-00-043-4312
NSN 6240-00-951-7698
NSN 5835-01-193-6192