NSN 4820-01-456-7972 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-456-7972. Manufacturer of record part number: 0-811-402-031.
Operating Pressure: 4570.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Maximum Operating Temp: 122.0 FAHRENHEIT SINGLE RESPONSE DEGF
Material: IRON BODY
Valve Operation Method: SOLENOID
Identification
NSN: 4820-01-456-7972
NIIN: 014567972
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 0-811-402-031
Manufacturer: Robert Bosch Llc
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-456-7972, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Robert Bosch Llc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-456-7972
Primary Part Number
0-811-402-031
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Robert Bosch Llc
Status
ACTIVE
Flow Control Device
POPPET
Minimum Operating Temp
-4.0 FAHRENHEIT DEGF
Style Designator
DROP-IN CARTRIDGE
Operating Pressure
4570.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Related Parts in Valves
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
8171E-1/4HS2
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
D559A3M2
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-456-7972?
NSN 4820-01-456-7972 is a Valve,safety Relief, manufactured by Robert Bosch Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-456-7972?
NSN 4820-01-456-7972 has 2 manufacturer part numbers on file: 0-811-402-031 (Robert Bosch Llc), W084822408 (Wartsila France SAS).
What are the specifications of 0-811-402-031?
Key specifications for 0-811-402-031: Flow Control Device: POPPET; Minimum Operating Temp: -4.0 FAHRENHEIT DEGF; Style Designator: DROP-IN CARTRIDGE; Operating Pressure: 4570.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-456-7972 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.