Mfr name for this item is "fuse spring"
A rectangular or irregular shaped device with one or more holes for attaching to a hook or the like. Constructed of such material that will fuse (melt) at a known temperature. It is used in conjunction with autoomatic closing devices for door, window, automatic appliances and the like. Excludes fuse, link, thermal.
NSN 6610-01-593-0135
NSN 5945-01-374-8587
NSN 5835-00-980-0468
NSN 6110-01-519-9131
NSN 5930-00-027-8428
NSN 5925-01-508-2348
NSN 5935-01-167-1334
NSN 5996-00-140-1733
NSN 5998-01-474-5238
NSN 5925-01-456-5853
NSN 5950-01-096-2494
NSN 6650-01-534-5787