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 5910-00-050-0410
NSN 6105-00-733-9226
NSN 5855-00-285-8172
NSN 6620-01-244-3425
NSN 5930-01-448-9787
NSN 6645-01-603-1004
NSN 6220-00-832-6097
NSN 6220-01-391-7561
NSN 5925-00-576-8179
NSN 7035-01-525-7673
NSN 5985-01-040-8329
NSN 7035-01-555-4349