5340-21-877-3397
Expansion Plug
5340218773397 218773397 31559
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. View more Expansion Plug
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Managed by Canada
NSN Created on 18 Oct 1977
Data Last Changed
January 2023
January 2023
NATO Update Count
1
1
NATO Data Quality

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Restrictions 5340-21-877-3397
Approved Sources 5340-21-877-3397
- Part Number
- Manufacturer
- Status
- 31559
- Manufacturer
- 05573 - Barnes Group Inc. (Active)
- Primary Buy
- Primary Buy
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