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 5965-00-275-0491
NSN 6110-01-540-3799
NSN 5835-00-896-0063
NSN 6620-00-755-7169
NSN 5920-01-047-1013
NSN 6240-01-510-9299
NSN 2925-01-106-3552
NSN 6240-01-063-7685
NSN 6110-00-740-5750
NSN 5999-01-503-2386
NSN 5965-01-566-2744
NSN 5910-01-425-2677