PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

102571Valve,safety Relief

Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S · NSN 4820-00-699-1550 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-699-1550 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-699-1550. Primary manufacturer part number: 102571.
Features
  • Valve,safety Relief — FSC 4820
  • Style Designator: ANGLE
  • Opening Pressure Setting: 40.0 POUNDS PER SQUARE INCH LBS
  • Disk Loading Method: SPRING
  • Valve Operation Method: AUTOMATIC
  • Features Provided: VALVE STEM LOCK SHIELD
  • Material: STEEL COMP 440A BODY A
  • Flow Control Device: BALL
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 440A Body construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-699-1550, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S. Government technical data includes 7 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-699-1550
Primary Part Number102571
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerItt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S
StatusACTIVE
Style DesignatorANGLE
Opening Pressure Setting40.0 POUNDS PER SQUARE INCH LBS
Disk Loading MethodSPRING
Valve Operation MethodAUTOMATIC
Features ProvidedVALVE STEM LOCK SHIELD
MaterialSTEEL COMP 440A BODY A
Flow Control DeviceBALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4730-00-037-4903102-571 INTERCHANGEABLE
Strainer Element,sediment
Hamilton Sundstrand Corporation
5305-00-071-358089-975D INTERCHANGEABLE
Setscrew
Dana Corp Spicer Transmission Div
5935-00-371-937810257-1 INTERCHANGEABLE
Polarizing Key,electrical Connec
Alliant Techsystems Operations Llc Div Defense Electronic Systems
5360-00-915-5230102-57-1 INTERCHANGEABLE
Spring,contact
Ward Leonard Ct Llc
5305-01-104-10510102571 INTERCHANGEABLE
Setscrew
Caterpillar Inc Div Caterpillar Defense
5950-01-157-772410-2571 INTERCHANGEABLE
Reactor
Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc
5330-01-207-0277102571 INTERCHANGEABLE
Gasket
Ohio Medical Corporation Dba Ohio Medical Corp Ltd U.k
1005-01-566-0543 INTERCHANGEABLE
Receiver,small Arms
Cross-Reference Index
Part NumberManufacturer
102571 PRIMARY Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S (USA)
Related Parts
4730-00-037-4903INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
102-571
5305-00-071-3580INTERCHANGEABLE
SETSCREW
89-975D
5935-00-371-9378INTERCHANGEABLE
POLARIZING KEY,ELECTRICAL CONNEC
10257-1
5360-00-915-5230INTERCHANGEABLE
SPRING,CONTACT
102-57-1
5305-01-104-1051INTERCHANGEABLE
SETSCREW
0102571
5950-01-157-7724INTERCHANGEABLE
REACTOR
10-2571
5330-01-207-0277INTERCHANGEABLE
GASKET
102571
1005-01-566-0543INTERCHANGEABLE
RECEIVER,SMALL ARMS

Frequently Asked Questions

What is NSN 4820-00-699-1550?

NSN 4820-00-699-1550 is a Valve,safety Relief, manufactured by Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-699-1550?

NSN 4820-00-699-1550 has 1 cross-referenced part number: 102571 (Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S).

What NSN replaces 4820-00-699-1550?

There are 8 known substitutes for 4820-00-699-1550: 4730-00-037-4903, 5305-00-071-3580, 5935-00-371-9378 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 102571?

Key specifications for 102571: Style Designator: ANGLE; Opening Pressure Setting: 40.0 POUNDS PER SQUARE INCH LBS; Disk Loading Method: SPRING; Valve Operation Method: AUTOMATIC. 8 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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