Core material: sand
An externally threaded cylindrical item, usually containing a fusible core, or a tapered smooth finished press-in insert made entirely of metallic eutectic substance. If without core, the item may be machined internally or have provisions to accomodate same. It is a safety device for aircraft wheels (prevents heat induced tire explosion), boilers, compressors, and similar equipment.
NSN 5960-01-460-0115
NSN 5835-00-537-7780
NSN 4140-01-650-1208
NSN 5990-00-543-0234
NSN 5960-00-215-5884
NSN 6110-01-272-9246
NSN 5925-01-649-2560
NSN 6685-00-678-9004
NSN 5999-00-802-2918
NSN 6240-01-378-4417
NSN 5950-00-551-3105
NSN 5925-00-493-1881