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 2925-01-562-8051
NSN 6130-01-415-7595
NSN 5999-01-573-6833
NSN 5945-01-250-3254
NSN 6240-01-243-1911
NSN 6645-01-530-3654
NSN 5950-00-124-0033
NSN 5998-00-214-0251
NSN 7035-00-803-3056
NSN 6145-00-150-5049
NSN 5990-01-253-1332
NSN 5905-00-927-5724