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 6150-00-101-4873
NSN 5965-00-858-5398
NSN 5925-00-736-0425
NSN 5925-01-071-1802
NSN 5910-00-244-0048
NSN 5985-01-091-9660
NSN 6610-01-378-8422
NSN 6130-00-528-7838
NSN 2925-01-022-8332
NSN 5915-00-499-9054
NSN 5930-01-014-0237
NSN 2925-01-197-7864