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 5998-01-498-4152
NSN 5990-01-150-7443
NSN 5960-00-051-4716
NSN 2925-01-290-7060
NSN 6645-00-392-8728
NSN 6240-00-486-8447
NSN 5998-01-166-9389
NSN 5905-01-423-1541
NSN 5985-01-212-8733
NSN 5855-00-939-4496
NSN 5950-00-081-1905
NSN 5910-01-361-8864