Product Details | PRESSURE RELIEF SAFETY HEAD

4820-01-420-4421 An item of varying shape and size consisting of a metallic body which incloses a nonreusable metallic or nonmetallic disk(s), which is designed and calibrated to burst at a given pressure. It may be used independently, or in conjunction with relief valves to relieve overpressure, and to protect relief valve(s) from corrosive conditions. Excludes VALVE, SAFETY RELIEF and PLUG, FUSIBLE. For items furnished with a disk, see HEAD AND DISK, SAFETY, PRESSURE RELIER.

Part Alternates: 5526-24 BAR , 5526-24.1BAR-CE , 5526241BARCE, 552624BAR, 5526350, 5526-350, 5526350CE, 5526-350-CE, 522.552624 , 4820-01-420-4421, 01-420-4421, 4820014204421, 014204421, 522552624

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 17 OCT 1995 01-420-4421

Demand History | NSN 4820-01-420-4421

Part Number Request Date QTY Origin
4820-01-420-4421 2016-10-297 97 DIBBS
4820-01-420-4421 2015-03-64 92 DIBBS
4820-01-420-4421 2013-05-149 61 DIBBS
4820-01-420-4421 2011-08-238 11 DIBBS
4820-01-420-4421 2010-04-98 4 DIBBS
4820-01-420-4421 2009-09-267 1 DIBBS
4820-01-420-4421 2009-08-218 6 DIBBS
4820-01-420-4421 2009-07-211 10 DIBBS

Cross Reference | NSN 4820-01-420-4421

Part Number Cage Code Manufacturer
5526-24.1BAR-CE U0EL8 WOLSELEY UK LIMITED
5526-350 28193 HENRY TECHNOLOGIES INC.
5526-350-CE 28193 HENRY TECHNOLOGIES INC.

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Technical Data | NSN 4820-01-420-4421

Characteristic Specifications
HEAD MATERIAL COPPER ALLOY
END CONNECTION TYPE THREADED
BURST PRESSURE 350.0 PRESSURE POUNDS PER SQUARE INCH ABSOLUTE
BURST TEMPERATURE 72.0 DEG FAHRENHEIT

Restrictions/Controls & Freight Information | NSN 4820-01-420-4421

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Electro-static Discharge Susceptible:ANo known Electrostatic Discharge (ESD) or Electromagnetic Interference (EMI) sensitivity
Precious Metals Indicator Code:AItem does not contain precious metal
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Automatic Data Processing Equipment:0Represents items with no ADP components. NOTE: Codes 1 through 6 are only to be used when the item is Automatic Data Processing Equipment (ADPE) in its entirety and is limited to the type meeting only one of the definitions for codes 1 through 6. (See code 9)
Category Code Description
NMF Description 127220 PRESSURE REG/RED/RELIEF VALVES NOI
Less than car load rating
Less than truck load rating P 77.5
Water commodity Code 594 unknown
Originating Activity Code ZC Canada
ZD
ZE
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity V Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable

Management | NSN 4820-01-420-4421

Category Code Description
Cognizance Codes9BNavy-owned stocks of DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
Acquisition Advice CodesZINSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each