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 6320-01-318-6518
NSN 6220-00-827-0227
NSN 5910-01-469-2463
NSN 6110-01-314-0591
NSN 6685-01-505-7941
NSN 5895-01-384-1756
NSN 5985-00-425-4430
NSN 5975-00-612-7048
NSN 6110-01-355-4536
NSN 6105-00-733-9226
NSN 6620-01-197-8207
NSN 4140-01-333-1439