PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

582R056H02Valve,safety Relief

Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp · NSN 4820-01-033-8464 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-033-8464 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-033-8464. Primary manufacturer part number: 582R056H02.
Features
  • Valve,safety Relief — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-033-8464, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameValve,safety Relief
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersNorthrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (CAGE 97942); Stratotech Llc (CAGE 15939)
Technical Specifications
ParameterValue
NSN4820-01-033-8464
Primary Part Number582R056H02
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5120-00-224-7271166A INTERCHANGEABLE
Vise,pin
L.s. Starrett Company (the) Div Tool Division
4720-00-706-3983166A INTERCHANGEABLE
Hose
Brinkley Technology Group Llc Dba Hercules Manufacturing
5310-01-033-1646385REVA INTERCHANGEABLE
Nut,sleeve
Stratotech Llc
6685-01-189-8214166A INTERCHANGEABLE
Thermostat,flow Control
Mack Trucks, Inc. Dba Macungie Operations Div Lehigh Valley Operations
Cross-Reference Index
Part NumberManufacturer
582R056H02 PRIMARY Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
582R056 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
166A PRIMARY Stratotech Llc (USA)
Related Parts
5120-00-224-7271INTERCHANGEABLE
VISE,PIN
166A
4720-00-706-3983INTERCHANGEABLE
HOSE
166A
5310-01-033-1646INTERCHANGEABLE
NUT,SLEEVE
385REVA
6685-01-189-8214INTERCHANGEABLE
THERMOSTAT,FLOW CONTROL
166A

Frequently Asked Questions

What is NSN 4820-01-033-8464?

NSN 4820-01-033-8464 is a Valve,safety Relief, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-033-8464?

NSN 4820-01-033-8464 has 3 cross-referenced part numbers: 582R056H02 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 582R056 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 166A (Stratotech Llc).

What NSN replaces 4820-01-033-8464?

There are 4 known substitutes for 4820-01-033-8464: 5120-00-224-7271, 4720-00-706-3983, 5310-01-033-1646 and 1 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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