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 5855-01-605-2438
NSN 5990-00-983-1813
NSN 5920-00-771-7280
NSN 5999-00-891-0962
NSN 5925-01-462-7251
NSN 6105-01-198-7890
NSN 5950-00-900-1096
NSN 5996-00-125-4570
NSN 6145-01-093-7082
NSN 5905-01-561-2063
NSN 6145-01-333-6580
NSN 6240-01-330-5742