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 5925-01-568-3131
NSN 5990-00-258-0228
NSN 6110-00-418-9363
NSN 5975-00-249-5063
NSN 5905-01-067-9402
NSN 6150-01-435-5026
NSN 5945-01-472-2099
NSN 6610-01-049-2661
NSN 6650-01-094-4663
NSN 6110-01-224-7502
NSN 6220-00-138-8886
NSN 5930-01-557-9333