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 5925-01-183-1203
NSN 2925-00-756-8510
NSN 5965-01-534-6396
NSN 5999-01-410-2867
NSN 6130-01-208-4655
NSN 4140-01-202-1032
NSN 6685-01-157-9340
NSN 6110-00-233-8121
NSN 5895-01-591-1580
NSN 6240-01-297-4329
NSN 6135-01-052-9634
NSN 6320-00-459-8973