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NSN 4820-01-265-3956, 4820012653956
VALVE,SAFETY RELIEF

Federal Supply Classification
FSC 4820 - Valves, Nonpowered
National Item Identification Number
NIIN 012653956
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 4820-01-265-3956

National Stock Number (NSN) 4820-01-265-3956, or NIIN 012653956, (valve,safety relief) was assigned October 14, 1987 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 7 manufacturer part numbers associated with this NSN. 5 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is 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 01, 2016. There have been 2 contracts issued for this part number, with 2 awards given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE7MC17P1173, SPE7MC17P1173, SPM7M211M2662, SPM7M211M2662. The total value of the awarded contracts has been US$ 153,437.00.

This NSN is unique to one weapons system.

There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. The 24 month forecast from the US Government for this part number has high volatility, with an estimated forecasted value of US$ 129,381. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Nov 25, 2010, 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 data needed to produce this item from additional sources is not physically available. Valid AMCs: 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 4820012653956 does not contain precious metals.

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

MAXIMUM OPERATING TEMP
(AEHZ) 450.0 DEG FAHRENHEIT SINGLE RESPONSE
ADJUSTABLE PRESSURE RANGE
(CQCY) +184.0/+206.0 POUNDS PER SQUARE INCH
ADJUSTABLE PRESSURE RANGE
(CQCY) +184.0 TO 206.0 POUNDS PER SQUARE INCH
BOLT HOLE NOMINAL DIAMETER
(CWCQ) 0.625 INCHES 2ND END
BOLT HOLE NOMINAL DIAMETER
(CWCQ) 0.750 INCHES 1ST END
BOLT HOLE QUANTITY
(AECS) 4 ALL ENDS
BONNET ATTACHMENT METHOD
(ADST) UNION
BONNET TYPE
(ADSR) INSIDE SPRING
BOLT CIRCLE NOMINAL DIAMETER
(CWCT) 3.875 INCHES 2ND END
BOLT CIRCLE NOMINAL DIAMETER
(CWCT) 5.500 INCHES 1ST END
CONNECTION TYPE
(AWLS) FLANGE ALL ENDS
DISK LOADING METHOD
(ADSU) SPRING
FIRST CONNECTION FACE TO CENTERLINE DISTANCE
(CWCL) 4.750 INCHES
FLANGE FACE DESIGN
(CWDF) RAISED STRAIGHT ALL ENDS
FLANGE SHAPE
(ARKN) ROUND WITH HOLES ALL ENDS
FLOW CONTROL DEVICE
(ADQU) DISK
MATERIAL
(MATT) STEEL BODY
MATERIAL
(MATT) STEEL CORROSION RESISTING FLOW CONTROL DEVICE
MATERIAL
(MATT) STEEL CORROSION RESISTING STEM
MAXIMUM OPERATING PRESSURE
(CQGM) 185.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP
(AEHZ) 450.0 FAHRENHEIT SINGLE RESPONSE
NOMINAL OUTSIDE DIAMETER
(CWCD) 5.000 INCHES 2ND END
NOMINAL OUTSIDE DIAMETER
(CWCD) 7.000 INCHES 1ST END
NOMINAL THICKNESS
(CWCK) 0.562 INCHES 2ND END
NOMINAL THICKNESS
(CWCK) 0.688 INCHES 1ST END
RAISED FACE NOMINAL DIAMETER
(CWDL) 2.875 INCHES 2ND END
RAISED FACE NOMINAL DIAMETER
(CWDL) 4.125 INCHES 1ST END
RAISED FACE NOMINAL HEIGHT
(CWDH) 0.062 INCHES 1ST END
RAISED FACE NOMINAL HEIGHT
(CWDH) 0.688 INCHES 2ND END
SECOND CONNECTION FACE TO CENTERLINE DISTANCE
(CWCR) 4.875 INCHES
VALVE OPERATION METHOD
(AQLR) AUTOMATIC
VALVE SIZE
(CCFG) 1.500 INCHES
STYLE DESIGNATOR
(STYL) ANGLE FLANGED ENDS
STYLE DESIGNATOR
(STYL) ERR-090


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