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 6620-00-515-6422
NSN 6130-00-226-5083
NSN 6135-00-248-4102
NSN 6135-00-369-2368
NSN 5975-00-083-1433
NSN 5925-01-571-7574
NSN 5965-01-426-8325
NSN 5905-01-367-1710
NSN 5905-01-415-3734
NSN 5920-01-099-8350
NSN 5935-00-111-8547
NSN 5895-00-152-5035