A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 7035-01-090-3369
NSN 5925-00-199-9565
NSN 5998-00-803-3067
NSN 5835-00-074-3700
NSN 5990-01-097-4721
NSN 2925-00-964-7128
NSN 5895-01-010-1742
NSN 6105-01-528-8027
NSN 5985-01-052-8261
NSN 5925-01-554-9486
NSN 5996-01-408-0364
NSN 5998-01-444-1266