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 5925-00-089-9928
NSN 5910-01-529-8741
NSN 5985-01-205-4756
NSN 4140-00-419-0631
NSN 5935-01-072-3030
NSN 6110-01-065-0232
NSN 5999-01-505-5324
NSN 5915-01-117-3543
NSN 5895-00-079-2055
NSN 6240-00-560-5426
NSN 5835-01-034-5206
NSN 5950-00-258-0220