PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

825021Valve,safety Relief

Hamilton Sundstrand Corporation · NSN 4820-00-863-8535 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-863-8535 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-863-8535. Primary manufacturer part number: 825021.
Features
  • Valve,safety Relief — FSC 4820
  • Flow Control Device: PLUG
  • Style Designator: STRAIGHT THRU
  • Valve Operation Method: AUTOMATIC
  • Disk Loading Method: SPRING
  • 1 verified cross-reference
  • Primary manufacturer: Hamilton Sundstrand Corporation
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-863-8535, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hamilton Sundstrand Corporation. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-863-8535
Primary Part Number825021
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHamilton Sundstrand Corporation
StatusACTIVE
Flow Control DevicePLUG
Style DesignatorSTRAIGHT THRU
Valve Operation MethodAUTOMATIC
Disk Loading MethodSPRING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
2910-01-501-8518 INTERCHANGEABLE
Actuator,electro-Mechanical,line
Cross-Reference Index
Part NumberManufacturer
825021 PRIMARY Hamilton Sundstrand Corporation (USA)
Related Parts
2910-01-501-8518INTERCHANGEABLE
ACTUATOR,ELECTRO-MECHANICAL,LINE

Frequently Asked Questions

What is NSN 4820-00-863-8535?

NSN 4820-00-863-8535 is a Valve,safety Relief, manufactured by Hamilton Sundstrand Corporation, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-863-8535?

NSN 4820-00-863-8535 has 1 cross-referenced part number: 825021 (Hamilton Sundstrand Corporation).

What NSN replaces 4820-00-863-8535?

There is 1 known substitute for 4820-00-863-8535: 2910-01-501-8518. Verify interchangeability with system specifications before substitution.

What are the specifications of 825021?

Key specifications for 825021: Flow Control Device: PLUG; Style Designator: STRAIGHT THRU; Valve Operation Method: AUTOMATIC; Disk Loading Method: SPRING. 4 total characteristics are documented in the Federal Logistics Information System.

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