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 6145-01-484-8735
NSN 5960-00-426-8028
NSN 5945-00-470-2884
NSN 6685-01-076-6180
NSN 5975-01-011-7239
NSN 6110-01-276-5407
NSN 6135-01-371-9209
NSN 5920-01-107-4454
NSN 6145-00-476-5833
NSN 5910-01-480-2904
NSN 6320-01-462-2295
NSN 5990-00-887-0147