Product Details | SAFETY RELIEF VALVE

4820-01-105-9446 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: C1058, D539T3M1, 4820-01-105-9446, 01-105-9446, 4820011059446, 011059446

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 08 JAN 1981 01-105-9446

Drawings & Photos | NSN 4820-01-105-9446


Demand History | NSN 4820-01-105-9446

Part Number Request Date QTY Origin
C1058 2025-01-24 9 DIBBS
D539T3M1 2025-01-24 9 DIBBS
C1058 2025-01-13 9 DIBBS
D539T3M1 2025-01-13 9 DIBBS
C1058 2024-12-347 5 DIBBS
D539T3M1 2024-12-347 5 DIBBS
C1058 2024-08-218 2 DIBBS
D539T3M1 2024-08-218 2 DIBBS

Cross Reference | NSN 4820-01-105-9446

Part Number Cage Code Manufacturer
C1058 81755 LOCKHEED MARTIN CORPORATION DBA LOCKHEED MARTIN AERONAUTICS
D539T3M1 91816 CIRCOR AEROSPACE, INC. DBA CIRCLE SEAL CONTROLS

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Technical Data | NSN 4820-01-105-9446

Characteristic Specifications
MATERIAL STEEL COMP 303 BODY STEEL COMP 303 AND RUBBER FLOW CONTROL DEVICE STEEL COMP 303 SEAT
MATERIAL DOCUMENT AND CLASSIFICATION AISI 303 ASSN STD SINGLE MATERIAL RESPONSE BODY AISI 303 ASSN STD SINGLE MATERIAL RESPONSE SEAT
STYLE DESIGNATOR C5 STRAIGHT THRU W/BAFFLE
FLOW CONTROL DEVICE POPPET
MEDIA FOR WHICH DESIGNED AIR 1ST RESPONSE GAS, INERT 2ND RESPONSE HYDROGEN 3RD RESPONSE REFRIGERANT 12 4TH RESPONSE
MAXIMUM OPERATING PRESSURE 200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MAXIMUM OPERATING TEMP 250.0 DEG FAHRENHEIT SINGLE RESPONSE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE THREADED EXTERNAL PIPE 1ST END
CONNECTION STYLE G46B PLAIN 1ST END
THREAD SERIES DESIGNATOR NPT 1ST END
NOMINAL THREAD SIZE 0.375 INCHES 1ST END
THREAD DIRECTION RIGHT-HAND 1ST END
DISK LOADING METHOD SPRING
OPENING PRESSURE SETTING 1.0 POUNDS PER SQUARE INCH
FURNISHED ITEMS AND QUANTITY 1 DEFLECTOR CAP

Restrictions/Controls & Freight Information | NSN 4820-01-105-9446

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.
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 AX Defense Supply Center Columbus
Columbus, OH 43216-5000
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