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 6685-00-105-3354
NSN 5915-01-025-1362
NSN 5835-01-250-2939
NSN 6150-00-659-1310
NSN 2925-01-341-0457
NSN 5975-00-409-0791
NSN 6135-00-112-8637
NSN 6105-01-598-9077
NSN 5996-01-506-6322
NSN 5985-00-492-5365
NSN 6105-01-611-5916
NSN 5915-01-047-5341