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 6105-00-152-3825
NSN 5990-01-485-0260
NSN 5930-01-441-6770
NSN 5960-00-981-3014
NSN 5935-01-422-6245
NSN 5915-00-540-8350
NSN 5925-00-142-0752
NSN 6320-01-504-3948
NSN 6135-00-983-9187
NSN 6130-01-222-1541
NSN 5950-01-142-2224
NSN 6150-01-435-3683