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 6685-01-102-2330
NSN 7035-01-431-9693
NSN 5920-00-320-7800
NSN 5895-00-087-3196
NSN 5945-00-170-4160
NSN 5925-01-537-0409
NSN 6130-01-652-9904
NSN 6240-00-432-0328
NSN 5855-01-323-5394
NSN 5910-00-099-9998
NSN 5985-01-222-8349
NSN 6240-00-771-2263