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 6220-00-208-9058
NSN 6130-01-515-3723
NSN 5930-00-838-6805
NSN 6220-00-623-2337
NSN 5855-00-782-7714
NSN 6620-01-407-5619
NSN 5905-00-967-3432
NSN 6145-01-505-7334
NSN 6610-01-319-5039
NSN 5965-01-424-7417
NSN 5905-01-262-4597
NSN 6685-01-413-4632