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 7035-00-763-6180
NSN 5935-01-043-9981
NSN 6130-00-466-8555
NSN 6145-01-440-9225
NSN 5965-01-040-9814
NSN 6620-00-351-9949
NSN 5999-01-414-6409
NSN 6620-01-506-5418
NSN 5920-01-413-3887
NSN 5930-00-952-2639
NSN 2925-00-265-7539
NSN 6150-01-301-7501