Material is steel, federal standard no. 66; steel no.S 1008 to 1022
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 5960-01-481-3722
NSN 5920-01-010-2920
NSN 5855-01-119-5869
NSN 5930-00-977-7846
NSN 2925-01-071-9291
NSN 6110-01-604-8811
NSN 4140-00-881-9303
NSN 5920-01-587-9083
NSN 4140-01-650-5730
NSN 6685-01-228-5332
NSN 6110-01-287-2769
NSN 6130-00-470-0522