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 5930-00-369-1645
NSN 5965-01-431-7377
NSN 5905-01-378-4340
NSN 6135-01-646-5986
NSN 6685-01-371-3050
NSN 4140-01-654-8054
NSN 5925-00-833-8291
NSN 6650-01-324-0351
NSN 6240-00-204-9355
NSN 5895-01-573-8209
NSN 6145-01-254-8502
NSN 2925-00-698-4882