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 5975-01-494-9704
NSN 6220-01-085-4947
NSN 5965-01-107-4078
NSN 5930-00-814-6526
NSN 6620-00-305-8481
NSN 4140-01-056-4453
NSN 5895-01-499-5623
NSN 6645-00-011-9662
NSN 7035-01-322-8180
NSN 6150-00-067-5957
NSN 6685-01-158-4129
NSN 5945-01-236-6585