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 5855-00-357-1158
NSN 4140-01-542-9504
NSN 5965-00-675-8799
NSN 5965-01-623-6065
NSN 5835-00-170-5238
NSN 7035-00-124-9383
NSN 6150-01-014-8391
NSN 5975-01-231-4180
NSN 2925-01-140-1015
NSN 6685-01-401-5360
NSN 6240-01-152-7046
NSN 6610-00-732-2488