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 5945-01-065-0887
NSN 6650-01-025-7425
NSN 5999-01-076-3688
NSN 2925-01-120-8712
NSN 6645-00-079-1430
NSN 6240-00-551-3144
NSN 5998-01-003-2047
NSN 5910-00-010-0521
NSN 5905-00-242-5400
NSN 7035-01-160-4423
NSN 5920-01-303-6841
NSN 6650-01-625-0018