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 5925-01-295-2842
NSN 4140-01-371-3700
NSN 6135-01-041-3829
NSN 5905-01-650-6550
NSN 6145-01-541-2359
NSN 5910-01-578-4575
NSN 5895-01-369-6879
NSN 6220-01-460-7416
NSN 4140-01-306-7138
NSN 2925-01-497-9381
NSN 5985-01-160-8240
NSN 5945-00-258-4439