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 6320-01-512-2031
NSN 2925-00-200-0085
NSN 5920-01-192-8605
NSN 5945-00-010-0558
NSN 5935-01-510-7576
NSN 6240-01-199-3073
NSN 5960-00-484-3746
NSN 5920-01-239-8857
NSN 6650-01-364-1313
NSN 6220-00-145-1423
NSN 2925-01-337-9783
NSN 5920-01-417-8748