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 6610-01-568-5241
NSN 7035-00-349-8571
NSN 5910-00-073-1885
NSN 2925-01-572-4933
NSN 6110-01-442-1336
NSN 6135-00-078-9931
NSN 5935-01-243-0150
NSN 5930-01-365-9646
NSN 6240-00-607-0828
NSN 5975-00-891-9738
NSN 5996-01-617-9967
NSN 5975-00-125-6683