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 5945-01-324-5979
NSN 7035-01-658-1623
NSN 4140-00-706-8991
NSN 5855-00-610-4052
NSN 5960-01-061-9166
NSN 6105-00-404-7656
NSN 5895-01-450-4797
NSN 5950-01-027-0035
NSN 5998-00-220-5796
NSN 6320-01-422-0765
NSN 6105-01-479-5494
NSN 5975-01-133-3975