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		                        | National Stock Number:
 4820-00-485-4392
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 004854392
 
 Description:
 DISK,RUPTURABLE
 
 Detail:
 A THIN, CIRCULAR, METALLIC OR NONMETALLIC ITEM WITH A FLAT OR PREBULGED CROSS-SECTIONAL SHAPE, DESIGNED TO RUPTURE AT A PREDETERMINED PRESSURE TO PREVENT DAMAGE TO HYDRAULIC OR PNEUMATIC SYSTEMS, OR THE LIKE. IT MAY INCLUDE MULTIPLE PIECES, SUCH AS A RETAINER RING, DISK AND VACUUM SUPPORT. IT CAN BE USED INDEPENDENTLY OR AS A COMPONENT PART OF A HEAD, SAFETY, PRESSURE RELIEF. FOR ITEMS FURNISHED WITH A HOLDER, SEE HEAD AND DISK, SAFETY, PRESSURE RELIEF. FOR ITEMS WITHOUT A RUPTURE PRESSURE RATING, SEE DISK, SOLID, PLAIN. EXCLUDES DIAPHRAGM, VALVE, FLAT; DIAPHRAGM, VALVE, SPECIAL SHAPED; DISK, VALVE; AND INSULATOR, DISK.
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 Manufacturer Information:
 
 | 4048025-2 | 11243 | COSMODYNE, LLC |  | 4048025-2 | 31468 | RYAN INDUSTRIES DIV OF CORDON INTERNATIONAL CORP |  | 4048025-2CP | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG |  | 552AS125-2 | 30003 | NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY  NOT MATERIAL/PARTS SUPPLIER |  | SF-60 1/2 NPT T | 32874 | BS&B SAFETY SYSTEMS LLC | 
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 Techincal Specification:
 
 | BURST PRESSURE | 7000.0 PRESSURE POUNDS PER SQUARE INCH GAGE |  | CRITICALITY CODE JUSTIFICATION | ZZZY |  | DISK MATERIAL | STEEL CORROSION RESISTING |  | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330 | 
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