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 6105-00-190-0224
NSN 4140-00-003-7228
NSN 5895-01-080-2839
NSN 5930-00-059-3687
NSN 6105-01-487-5072
NSN 5905-01-014-2390
NSN 5999-01-358-3501
NSN 6320-01-160-7757
NSN 6320-01-562-1599
NSN 6220-00-010-1595
NSN 5910-01-026-1085
NSN 6320-00-261-9136