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 7035-01-218-6960
NSN 5910-01-029-8255
NSN 6240-00-813-6328
NSN 5945-00-872-7165
NSN 5945-01-387-9068
NSN 6150-00-448-0007
NSN 6320-01-578-6006
NSN 5965-01-225-6080
NSN 5945-01-112-3056
NSN 6650-01-289-3901
NSN 2925-01-170-1089
NSN 6220-01-375-7521