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 5960-01-079-0660
NSN 5930-01-065-0890
NSN 5920-01-487-5516
NSN 5855-01-010-4921
NSN 6130-01-345-2842
NSN 5975-01-380-7175
NSN 5975-01-313-7522
NSN 5945-00-410-2718
NSN 5985-00-285-8466
NSN 5998-00-275-2813
NSN 5999-00-536-7596
NSN 5925-01-401-5314