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 6650-00-077-0638
NSN 5895-01-068-8578
NSN 5990-01-517-7848
NSN 5975-01-176-2515
NSN 5905-00-163-3946
NSN 5895-01-258-5933
NSN 6320-01-512-2031
NSN 5950-01-634-0677
NSN 5895-01-018-6345
NSN 5910-01-116-3339
NSN 6145-00-196-1394
NSN 5998-01-628-6783