Product Details | SAFETY RELIEF VALVE

4820-01-283-2986 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.

Part Alternates: 5267055, 5267055002, 5267055-002, 559T12MP12, 559T1-2MP-12, 4820-01-283-2986, 01-283-2986, 4820012832986, 012832986

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 02 AUG 1988 01-283-2986

Drawings & Photos | NSN 4820-01-283-2986


Demand History | NSN 4820-01-283-2986

Part Number Request Date QTY Origin
559T1-2MP-12 2025-02-41 16 DIBBS
559T1-2MP-12 2024-06-176 16 DIBBS
4820-01-283-2986 2017-01-16 10 United States
4820-01-283-2986 2016-04-119 12 DIBBS
4820-01-283-2986 2016-03-88 4 DIBBS
4820-01-283-2986 2016-03-77 4 DIBBS
4820-01-283-2986 2012-08-226 8 DIBBS
4820-01-283-2986 2011-12-341 3 DIBBS

Cross Reference | NSN 4820-01-283-2986

Part Number Cage Code Manufacturer
5267055 53711 NAVAL SEA SYSTEMS COMMAND
5267055-002 53711 NAVAL SEA SYSTEMS COMMAND
559T1-2MP-12 91816 CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS

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Technical Data | NSN 4820-01-283-2986

Characteristic Specifications
MATERIAL STEEL COMP 316 BODY
MATERIAL DOCUMENT AND CLASSIFICATION ASTM A479,TY 316 ASSN STD SINGLE MATERIAL RESPONSE BODY
SURFACE TREATMENT PASSIVATE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-35,TYPE I,II OR III FED SPEC SINGLE TREATMENT RESPONSE
STYLE DESIGNATOR C4 STRAIGHT THRU
MAXIMUM OPERATING PRESSURE 200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 400.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE THREADED EXTERNAL PIPE 1ST END THREADED INTERNAL PIPE 2ND END
CONNECTION STYLE G46B PLAIN 1ST END G9 PLAIN 2ND END
THREAD SERIES DESIGNATOR NPT 1ST END NPT 2ND END
NOMINAL THREAD SIZE 0.250 INCHES 1ST END 0.250 INCHES 2ND END
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 12.0 POUNDS PER SQUARE INCH
III FSC APPLICATION DATA AN/SLQ-48,VEHICLE,SUBMERSIBLE MINE LOCATOR,MNS
MANUFACTURERS CODE 53711
MFR SOURCE CONTROLLING REFERENCE 5267055

Restrictions/Controls & Freight Information | NSN 4820-01-283-2986

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
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 HD Naval Inventory Control Point
Mechanicsburg, PA 17055-0788
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 4820-01-283-2986

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 CodesDDoD INTEGRATED MATERIEL-MANAGED, STOCKED, AND ISSUED # Issue, transfer, or shipment is not subject to specialized controls other than those imposed by the Integrated Materiel Manager/Service supply policy. 1. The item is centrally managed, stocked, and issued. 2. Requisitions must contain the fund citation required to acquire the item. Requisitions will be submitted in accordance with Integrated Materiel Manager(IMM)/Service requisitioning procedures.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each