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 7035-00-335-7283
NSN 5905-01-369-5680
NSN 6105-01-314-4846
NSN 5905-01-634-0595
NSN 5999-00-212-7853
NSN 6685-01-356-8177
NSN 5910-01-415-1214
NSN 5895-01-080-0134
NSN 6320-01-512-2031
NSN 5990-01-591-8797
NSN 7035-00-205-1932
NSN 5990-00-277-3763