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 5855-01-125-4768
NSN 5855-01-634-0259
NSN 5855-00-688-9954
NSN 5950-01-076-5052
NSN 6145-00-286-9588
NSN 2925-01-196-6187
NSN 5950-01-579-4485
NSN 6650-00-796-9972
NSN 6645-01-235-1601
NSN 5965-01-444-9227
NSN 6620-01-612-9030
NSN 5925-01-634-0664