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 5990-01-191-1772
NSN 5975-01-543-3862
NSN 6110-00-851-6056
NSN 6130-00-467-5014
NSN 5935-00-005-9938
NSN 5920-01-319-5200
NSN 5945-01-496-1638
NSN 5930-00-170-6748
NSN 6130-01-415-6051
NSN 5975-00-416-6588
NSN 5990-00-018-9723
NSN 5895-01-411-0191