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NSN 4820-00-855-6818, 4820008556818
Cancelled -> Replaced by 4820004479565

Federal Supply Classification
FSC 4820 - Valves, Nonpowered
National Item Identification Number
NIIN 008556818
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 4820-00-855-6818

National Stock Number (NSN) 4820-00-855-6818, or NIIN 008556818, (valve,safety relief) was assigned January 1, 1962 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 4820004479565.

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

This part number has not been procured by the US Government in over 5 years, with the most recent procurement date of Dec 12, 2011. There have been 6 contracts issued for this part number, with 6 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 3 different suppliers. The last contract numbers awarded were: SPM7M512V0942, SPM7M111VP626, SPM7M511V4368, SPM7M510V3367, SPM7M210M4771. The total value of the awarded contracts has been US$ 15,504.81.

This NSN is very common among different weapons systems, belonging to 27 different platforms.

There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Apr 25, 2008, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The annual buy value of this part falls below the screening threshold of $10,000 but it has been screened for known source(s). (NOTE: This code shall not be used when screening parts entering the inventory. It shall not be assigned in preference to or supersede any other AMSC.) 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 4820008556818 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) G42 FLARED (TUBE) 1ST END
CONNECTION STYLE
(AHNC) G46B PLAIN (PIPE) 2ND END
MAXIMUM OPERATING TEMP
(AEHZ) 200.0 DEG FAHRENHEIT SINGLE RESPONSE
STYLE DESIGNATOR
(STYL) ERR-090
BONNET ATTACHMENT METHOD
(ADST) INTEGRAL
BONNET TYPE
(ADSR) INSIDE SPRING
CONNECTION TYPE
(AWLS) THREADED EXTERNAL PIPE 2ND END
CONNECTION TYPE
(AWLS) THREADED EXTERNAL TUBE 1ST END
CONNECTION STYLE
(AHNC) FLARED (TUBE) 1ST END
CONNECTION STYLE
(AHNC) PLAIN (PIPE) 2ND END
DISK LOADING METHOD
(ADSU) SPRING
FEATURES PROVIDED
(CBBL) VALVE STEM LOCK SHIELD AND PRESSURE TIGHT OUTLET SIDE
FLOW CONTROL DEVICE
(ADQU) POPPET
MATERIAL
(MATT) COPPER ALLOY OVERALL
MAXIMUM OPERATING TEMP
(AEHZ) 200.0 FAHRENHEIT SINGLE RESPONSE
MAXIMUM OPERATING PRESSURE
(CQGM) 450.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED
(CWFD) 0.625 INCHES 1ST END
NOMINAL PIPE SIZE ACCOMMODATED
(AAAR) 0.500 INCHES 2ND END
NOMINAL THREAD SIZE
(CQJX) 0.500 INCHES 2ND END
NOMINAL THREAD SIZE
(CQJX) 0.875 INCHES 1ST END
OPENING PRESSURE SETTING
(CSDC) 300.0 POUNDS PER SQUARE INCH
SEAT ANGLE
(CQRB) 37.0 DEGREES 1ST END
STYLE DESIGNATOR
(STYL) ANGLE
THREAD DIRECTION
(AAJF) RIGHT-HAND ALL ENDS
THREAD CLASS
(AAJD) 3A 1ST END
THREAD SERIES DESIGNATOR
(THSD) NPT 2ND END
THREAD SERIES DESIGNATOR
(THSD) UNF 1ST END
VALVE DISCHARGE FLOW RATE
(ADSY) 24.6 POUNDS PER HOUR
VALVE OPERATION METHOD
(AQLR) AUTOMATIC

Manufacturer Part Numbers

527

RNCC
C
RNVC
1
527

RNCC
5
RNVC
2
527

RNCC
5
RNVC
1
527450

RNCC
5
RNVC
9
527E450

RNCC
3
RNVC
9
TQW12366001

RNCC
5
RNVC
2

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