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 6150-00-812-5825
NSN 5945-00-071-2863
NSN 6610-01-076-4800
NSN 5895-01-558-1075
NSN 5985-01-362-6859
NSN 5996-01-482-7596
NSN 6110-01-439-9615
NSN 6645-00-476-7176
NSN 5965-01-461-2850
NSN 5895-00-155-8581
NSN 6650-01-326-3799
NSN 5905-01-338-5506