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 5895-01-351-3203
NSN 5975-01-578-6071
NSN 5990-00-193-3028
NSN 6645-01-387-4811
NSN 5945-01-588-4535
NSN 5965-01-005-0341
NSN 5855-01-489-5808
NSN 6150-01-159-3981
NSN 6110-00-179-4260
NSN 6240-00-167-2467
NSN 6105-00-285-2774
NSN 6645-01-053-3185