The frangible nut is an explosively separated nut design used to sever mechanical connections, where the bolt or stud will remain intact while the nut itself is split into two or more pieces.
The frangible nut contains machined features that provide break plane location(s) (webs) to control the separation, fragmentation and the design’s breaking strength. Explosive booster assemblies are strategically located within the nut assembly, and upon actuation will separate the nut at the pre-determined break plane(s). The booster(s) are functioned simultaneously to ensure that the nut splits uniformly, allowing for a clean separation of the joined assemblies.
The Frangible Nut is used in applications requiring
- launch vehicle hold down
- release bulkhead
- component release systems
- jettison rockets, satellites or other components
The frangible nut design heritage includes Apollo, Space Shuttle’s Solid Rocket Booster/Mobile Launch Platform, X-33 and is currently in use for Atlas V and Delta IV launch vehicles.
2.00 inch UNS Up to 3.50 inch
-71°F to +220°F
Axial Load Retention
Up to +1,000,000 lbf
Qualified to NHB5300.4(1C) NASA Standard
ENVELOPE / INTERFACE DIMENSIONS
The frangible nut axial load retention strength and thread sizes can be tailored to meet your specific applications.
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