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 6150-01-569-1157
NSN 5990-01-056-6413
NSN 5910-00-611-4945
NSN 6150-01-067-4720
NSN 5925-00-480-6710
NSN 5999-01-595-3858
NSN 7035-00-946-2642
NSN 5950-00-637-6131
NSN 5960-00-433-5832
NSN 5998-00-337-1115
NSN 6685-00-433-7476
NSN 6685-01-113-0461