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 5985-01-525-2668
NSN 5975-01-515-4238
NSN 5925-01-359-5532
NSN 6240-01-122-4263
NSN 5835-00-864-4481
NSN 5925-00-471-2730
NSN
NSN 5990-01-296-8190
NSN 6240-01-407-0596
NSN 5975-01-224-1802
NSN 5996-01-286-9089
NSN 5855-00-491-7079