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 2925-01-611-2423
NSN 5910-00-783-5268
NSN 5965-01-422-1392
NSN 6650-00-153-3155
NSN 6685-00-753-7668
NSN 7035-00-541-8516
NSN 5925-00-949-7359
NSN 5950-00-238-0217
NSN 5935-01-314-4947
NSN 5996-01-154-3749
NSN 5999-01-228-8031
NSN 6645-00-292-5053