Product Details | SAFETY RELIEF VALVE

4820-01-370-5963 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: PRFX0502700A, PRFX0502700AA, 20718-001 FIND 20, 20718001FIND20, 2110452, 21104-52, 21107, 2110777, 21107-77, 21820 FN 29, 21820FN29, 4820-01-370-5963, 01-370-5963, 4820013705963, 013705963

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 27 JAN 1993 01-370-5963

Drawings & Photos | NSN 4820-01-370-5963


Demand History | NSN 4820-01-370-5963

Part Number Request Date QTY Origin
21104-52 2025-11-329 76 DIBBS
21107-77 2025-11-329 76 DIBBS
21820 FN 29 2025-11-329 76 DIBBS
PRFX0502700A 2025-11-329 76 DIBBS
PRFX0502700AA 2025-11-329 76 DIBBS
21104-52 2025-06-170 28 DIBBS
21107-77 2025-06-170 28 DIBBS
21820 FN 29 2025-06-170 28 DIBBS
PRFX0502700A 2025-06-170 28 DIBBS
PRFX0502700AA 2025-06-170 28 DIBBS
21104-52 2024-06-156 76 DIBBS
21107-77 2024-06-156 76 DIBBS
21820 FN 29 2024-06-156 76 DIBBS
PRFX0502700A 2024-06-156 76 DIBBS
PRFX0502700AA 2024-06-156 76 DIBBS
21104-52 2024-05-134 76 DIBBS
21107-77 2024-05-134 76 DIBBS
21820 FN 29 2024-05-134 76 DIBBS
PRFX0502700A 2024-05-134 76 DIBBS
PRFX0502700AA 2024-05-134 76 DIBBS
21104-52 2024-04-106 32 DIBBS
21107-77 2024-04-106 32 DIBBS
21820 FN 29 2024-04-106 32 DIBBS
PRFX0502700A 2024-04-106 32 DIBBS
PRFX0502700AA 2024-04-106 32 DIBBS
21104-52 2024-04-95 32 DIBBS
21107-77 2024-04-95 32 DIBBS
21820 FN 29 2024-04-95 32 DIBBS
PRFX0502700A 2024-04-95 32 DIBBS
PRFX0502700AA 2024-04-95 32 DIBBS
21104-52 2024-02-57 5 DIBBS
21107-77 2024-02-57 5 DIBBS
21820 FN 29 2024-02-57 5 DIBBS
PRFX0502700A 2024-02-57 5 DIBBS
PRFX0502700AA 2024-02-57 5 DIBBS
21104-52 2024-02-43 42 DIBBS
21107-77 2024-02-43 42 DIBBS
21820 FN 29 2024-02-43 42 DIBBS
PRFX0502700A 2024-02-43 42 DIBBS
PRFX0502700AA 2024-02-43 42 DIBBS
21104-52 2024-02-39 5 DIBBS
21107-77 2024-02-39 5 DIBBS
21820 FN 29 2024-02-39 5 DIBBS
PRFX0502700A 2024-02-39 5 DIBBS
PRFX0502700AA 2024-02-39 5 DIBBS
21104-52 2024-02-32 42 DIBBS
21107-77 2024-02-32 42 DIBBS
21820 FN 29 2024-02-32 42 DIBBS
PRFX0502700A 2024-02-32 42 DIBBS
PRFX0502700AA 2024-02-32 42 DIBBS
21104-52 2024-01-21 42 DIBBS
21107-77 2024-01-21 42 DIBBS
21820 FN 29 2024-01-21 42 DIBBS
PRFX0502700A 2024-01-21 42 DIBBS
PRFX0502700AA 2024-01-21 42 DIBBS
21104-52 2024-01-07 25 DIBBS
21107-77 2024-01-07 25 DIBBS
21820 FN 29 2024-01-07 25 DIBBS
PRFX0502700A 2024-01-07 25 DIBBS
PRFX0502700AA 2024-01-07 25 DIBBS
21104-52 2023-10-282 15 DIBBS
21107-77 2023-10-282 15 DIBBS
21820 FN 29 2023-10-282 15 DIBBS
PRFX0502700A 2023-10-282 15 DIBBS
PRFX0502700AA 2023-10-282 15 DIBBS
21104-52 2023-09-271 11 DIBBS
21107-77 2023-09-271 11 DIBBS
21820 FN 29 2023-09-271 11 DIBBS
PRFX0502700A 2023-09-271 11 DIBBS
PRFX0502700AA 2023-09-271 11 DIBBS
21104-52 2023-06-177 7 DIBBS
21107-77 2023-06-177 7 DIBBS
21820 FN 29 2023-06-177 7 DIBBS
PRFX0502700A 2023-06-177 7 DIBBS
PRFX0502700AA 2023-06-177 7 DIBBS
21104-52 2023-05-145 5 DIBBS
21104-52 2023-05-145 8 DIBBS
21107-77 2023-05-145 5 DIBBS
21107-77 2023-05-145 8 DIBBS
21820 FN 29 2023-05-145 5 DIBBS
21820 FN 29 2023-05-145 8 DIBBS
PRFX0502700A 2023-05-145 5 DIBBS
PRFX0502700A 2023-05-145 8 DIBBS
PRFX0502700AA 2023-05-145 5 DIBBS
PRFX0502700AA 2023-05-145 8 DIBBS
21104-52 2023-04-102 10 DIBBS
21107-77 2023-04-102 10 DIBBS
21820 FN 29 2023-04-102 10 DIBBS
PRFX0502700A 2023-04-102 10 DIBBS
PRFX0502700AA 2023-04-102 10 DIBBS
21104-52 2023-03-66 35 DIBBS
21107-77 2023-03-66 35 DIBBS
21820 FN 29 2023-03-66 35 DIBBS
PRFX0502700A 2023-03-66 35 DIBBS
PRFX0502700AA 2023-03-66 35 DIBBS
21104-52 2023-02-53 6 DIBBS
21104-52 2023-02-53 5 DIBBS
21107-77 2023-02-53 6 DIBBS
21107-77 2023-02-53 5 DIBBS
21820 FN 29 2023-02-53 6 DIBBS
21820 FN 29 2023-02-53 5 DIBBS
PRFX0502700A 2023-02-53 6 DIBBS
PRFX0502700A 2023-02-53 5 DIBBS
PRFX0502700AA 2023-02-53 6 DIBBS
PRFX0502700AA 2023-02-53 5 DIBBS
21104-52 2023-02-40 5 DIBBS
21107-77 2023-02-40 5 DIBBS
21820 FN 29 2023-02-40 5 DIBBS
PRFX0502700A 2023-02-40 5 DIBBS
PRFX0502700AA 2023-02-40 5 DIBBS
21104-52 2023-02-33 6 DIBBS
21107-77 2023-02-33 6 DIBBS
21820 FN 29 2023-02-33 6 DIBBS
PRFX0502700A 2023-02-33 6 DIBBS
PRFX0502700AA 2023-02-33 6 DIBBS
21104-52 2023-01-24 35 DIBBS
21107-77 2023-01-24 35 DIBBS
21820 FN 29 2023-01-24 35 DIBBS
PRFX0502700A 2023-01-24 35 DIBBS
PRFX0502700AA 2023-01-24 35 DIBBS
21104-52 2023-01-12 6 DIBBS
21107-77 2023-01-12 6 DIBBS
21820 FN 29 2023-01-12 6 DIBBS
PRFX0502700A 2023-01-12 6 DIBBS
PRFX0502700AA 2023-01-12 6 DIBBS
21104-52 2022-12-335 6 DIBBS
21107-77 2022-12-335 6 DIBBS
21820 FN 29 2022-12-335 6 DIBBS
PRFX0502700A 2022-12-335 6 DIBBS
PRFX0502700AA 2022-12-335 6 DIBBS
21104-52 2022-11-331 6 DIBBS
21107-77 2022-11-331 6 DIBBS
21820 FN 29 2022-11-331 6 DIBBS
PRFX0502700A 2022-11-331 6 DIBBS
PRFX0502700AA 2022-11-331 6 DIBBS
21104-52 2022-11-312 10 DIBBS
21107-77 2022-11-312 10 DIBBS
21820 FN 29 2022-11-312 10 DIBBS
PRFX0502700A 2022-11-312 10 DIBBS
PRFX0502700AA 2022-11-312 10 DIBBS
21104-52 2022-10-300 10 DIBBS
21107-77 2022-10-300 10 DIBBS
21820 FN 29 2022-10-300 10 DIBBS
PRFX0502700A 2022-10-300 10 DIBBS
PRFX0502700AA 2022-10-300 10 DIBBS
21104-52 2022-08-223 7 DIBBS
21107-77 2022-08-223 7 DIBBS
21820 FN 29 2022-08-223 7 DIBBS
PRFX0502700A 2022-08-223 7 DIBBS
PRFX0502700AA 2022-08-223 7 DIBBS
21104-52 2022-06-172 2 DIBBS
21107-77 2022-06-172 2 DIBBS
21820 FN 29 2022-06-172 2 DIBBS
PRFX0502700A 2022-06-172 2 DIBBS
PRFX0502700AA 2022-06-172 2 DIBBS
21104-52 2022-06-160 10 DIBBS
21107-77 2022-06-160 10 DIBBS
21820 FN 29 2022-06-160 10 DIBBS
PRFX0502700A 2022-06-160 10 DIBBS
PRFX0502700AA 2022-06-160 10 DIBBS
21104-52 2022-05-151 3 DIBBS
21107-77 2022-05-151 3 DIBBS
21820 FN 29 2022-05-151 3 DIBBS
PRFX0502700A 2022-05-151 3 DIBBS
PRFX0502700AA 2022-05-151 3 DIBBS
21104-52 2022-05-124 3 DIBBS
21107-77 2022-05-124 3 DIBBS
21820 FN 29 2022-05-124 3 DIBBS
PRFX0502700A 2022-05-124 3 DIBBS
PRFX0502700AA 2022-05-124 3 DIBBS
21104-52 2022-04-117 1 DIBBS
21107-77 2022-04-117 1 DIBBS
21820 FN 29 2022-04-117 1 DIBBS
PRFX0502700A 2022-04-117 1 DIBBS
PRFX0502700AA 2022-04-117 1 DIBBS
21104-52 2022-04-103 17 DIBBS
21107-77 2022-04-103 17 DIBBS
21820 FN 29 2022-04-103 17 DIBBS
PRFX0502700A 2022-04-103 17 DIBBS
PRFX0502700AA 2022-04-103 17 DIBBS
21104-52 2022-03-79 12 DIBBS
21107-77 2022-03-79 12 DIBBS
21820 FN 29 2022-03-79 12 DIBBS
PRFX0502700A 2022-03-79 12 DIBBS
PRFX0502700AA 2022-03-79 12 DIBBS
21107 2017-08-214 140 United States
21107 2017-03-87 160 United States
21107 2016-11-307 120 United States
21107 2013-04-107 1 Singapore
4820-01-370-5963 2012-05-126 9 DIBBS
4820-01-370-5963 2011-12-342 5 DIBBS
4820-01-370-5963 2011-10-287 5 DIBBS
4820-01-370-5963 2011-10-278 15 DIBBS
4820-01-370-5963 2011-09-273 5 DIBBS
4820-01-370-5963 2011-09-258 5 DIBBS
4820-01-370-5963 2011-09-251 5 DIBBS
4820-01-370-5963 2011-02-38 6 DIBBS
4820-01-370-5963 2009-05-134 20 DIBBS
4820-01-370-5963 2009-05-126 5 DIBBS

Cross Reference | NSN 4820-01-370-5963

Part Number Cage Code Manufacturer
20718-001 FIND 20 78062 DOVER ENGINEERED SYSTEMS, INC. DBA SARGENT CONTROLS & AEROSPACE
21104-52 78062 DOVER ENGINEERED SYSTEMS, INC. DBA SARGENT CONTROLS & AEROSPACE
21107 78062 DOVER ENGINEERED SYSTEMS, INC. DBA SARGENT CONTROLS & AEROSPACE
21107-77 78062 DOVER ENGINEERED SYSTEMS, INC. DBA SARGENT CONTROLS & AEROSPACE
21820 FN 29 78062 DOVER ENGINEERED SYSTEMS, INC. DBA SARGENT CONTROLS & AEROSPACE
PRFX0502700A 78062 DOVER ENGINEERED SYSTEMS, INC. DBA SARGENT CONTROLS & AEROSPACE
PRFX0502700A 92555 THE LEE COMPANY
PRFX0502700AA 92555 THE LEE COMPANY

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Technical Data | NSN 4820-01-370-5963

Characteristic Specifications
MATERIAL STEEL CORROSION RESISTING BODY
STYLE DESIGNATOR C12 DROP-IN CARTRIDGE
VALVE OPERATION METHOD AUTOMATIC
CONNECTION TYPE UNTHREADED CARTRIDGE ALL ENDS
OPENING PRESSURE SETTING 700.0 POUNDS PER SQUARE INCH

Restrictions/Controls & Freight Information | NSN 4820-01-370-5963

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

Management | NSN 4820-01-370-5963

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