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 4140-00-113-8215
NSN 6610-01-474-5206
NSN 5965-01-551-7393
NSN 6110-01-551-0820
NSN 5855-01-197-2774
NSN 6645-00-171-9639
NSN 5855-01-519-2486
NSN 6240-01-412-3286
NSN 5985-00-526-3469
NSN 6610-00-156-5699
NSN 6145-01-574-3423
NSN 6110-01-330-6884