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NSN 4820-00-355-3994, 4820003553994
VALVE,SAFETY RELIEF

Federal Supply Classification
FSC 4820 - Valves, Nonpowered
National Item Identification Number
NIIN 003553994
Codification Country
United States
Item Name Code
INC 05488
Criticality
(X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code
(N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.
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DLMS® Summary

National Stock Number 4820-00-355-3994

National Stock Number (NSN) 4820-00-355-3994, or NIIN 003553994, (valve,safety relief) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 4 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 5 suppliers. Today, 4 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers are deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.

This part number has not been procured by the US Government in over 5 years.

This NSN is somewhat common among different platforms, belonging to 9 different weapons systems.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on May 23, 2008, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The data or the rights to use the data needed to purchase this part from additional sources are not owned by the Government and it has been determined that it is uneconomical to purchase them. Valid AMCs: 1, 2, 3, 4 and 5.

This NSN is assigned to Item Name Code (INC) 05488. [A VALVE DESIGNED TO AUTOMATICALLY RELEASE EXCESSIVE PRESSURES. IT IS ACTUATED BY STATIC PRESSURE UPSTREAM OF THE VALVE AND IS USED AS A SAFETY VALVE OR RELIEF VALVE, AND MAY BE SET TO CLOSE AT A PREDETERMINED PRESSURE. IT IS NOT DESIGNED FOR REGULATION OF CONTINUOUSLY FLUCTUATING LOADS. IT MAY BE INLINE OR CARTRIDGE (MANIFOLD) DESIGN. EXCLUDES:VALVE (1), RELIEF, PRESSURE AND TEMPERATURE.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4820003553994 contains an unknown precious metal.

This NSN is associated to Schedule B 8481400000: safety or relief valves. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 332911: industrial valve manufacturing.

This information was last updated on .


Technical Characteristics

CONNECTION STYLE
(AHNC) PLAIN (PIPE) 1ST END
MATERIAL
(MATT) STEEL STEM
THREAD DIRECTION
(AAJF) RIGHT-HAND 2ND END
NOMINAL THREAD SIZE
(CQJX) 0.250 INCHES 2ND END
CONNECTION STYLE
(AHNC) G46B PLAIN (PIPE) 1ST END
MATERIAL
(MATT) STEEL FLOW CONTROL DEVICE
CONNECTION TYPE
(AWLS) THREADED EXTERNAL PIPE 1ST END
CONNECTION TYPE
(AWLS) THREADED EXTERNAL PIPE 2ND END
CONNECTION STYLE
(AHNC) G46B PLAIN (PIPE) 2ND END
MATERIAL
(MATT) COPPER ALLOY BODY
CONNECTION STYLE
(AHNC) PLAIN (PIPE) 2ND END
THREAD SERIES DESIGNATOR
(THSD) NPT 1ST END
THREAD DIRECTION
(AAJF) RIGHT-HAND 1ST END
NOMINAL THREAD SIZE
(CQJX) 0.250 INCHES 1ST END
MAXIMUM OPERATING TEMP
(AEHZ) 250.0 FAHRENHEIT SINGLE RESPONSE
END ITEM IDENTIFICATION
(AGAV) GRUMMIN AEROSPACE A10 AIRCRAFT
CONNECTION TYPE
(AWLS) UNABLE TO DECODE
CONNECTION STYLE
(AHNC) UNABLE TO DECODE
DISK LOADING METHOD
(ADSU) SPRING
FEATURES PROVIDED
(CBBL) VALVE STEM LOCK SHIELD
FLOW CONTROL DEVICE
(ADQU) BALL
MATERIAL
(MATT) UNABLE TO DECODE
MAXIMUM OPERATING TEMP
(AEHZ) UNABLE TO DECODE
NOMINAL THREAD SIZE
(CQJX) UNABLE TO DECODE
OPENING PRESSURE SETTING
(CSDC) 180.0 POUNDS PER SQUARE INCH
STYLE DESIGNATOR
(STYL) ANGLE
THREAD DIRECTION
(AAJF) UNABLE TO DECODE
THREAD SERIES DESIGNATOR
(THSD) UNABLE TO DECODE
VALVE OPERATION METHOD
(AQLR) AUTOMATIC
MAXIMUM OPERATING TEMP
(AEHZ) 250.0 DEG FAHRENHEIT SINGLE RESPONSE
MATERIAL
(MATT) COPPER ALLOY SEAT
STYLE DESIGNATOR
(STYL) ERR-090
THREAD SERIES DESIGNATOR
(THSD) NPT 2ND END

Manufacturer Part Numbers

125

RNCC
5
RNVC
2
38436

RNCC
5
RNVC
9
S8603

ISC
2
RNCC
C
RNVC
1
S8603

RNCC
5
RNVC
9
S8603

RNCC
3
RNVC
2

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