PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A440Valve,safety Relief

Ausco Inc · NSN 4820-01-363-2095 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-363-2095 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-363-2095. Primary manufacturer part number: A440.
Features
  • Valve,safety Relief — FSC 4820
  • Connection Style: GROOVED (DROP-IN CARTRIDGE) ALL ENDS
  • Connection Type: UNTHREADED CARTRIDGE ALL ENDS
  • Adjustable Pressure Range: +120.0 TO 130.0 POUNDS PER SQUARE INCH LBS
  • Maximum Operating Temp: 275.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Operating Pressure: 41.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Style Designator: DROP-IN CARTRIDGE
  • Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-363-2095, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ausco Inc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-363-2095
Primary Part NumberA440
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAusco Inc
StatusACTIVE
Connection StyleGROOVED (DROP-IN CARTRIDGE) ALL ENDS
Connection TypeUNTHREADED CARTRIDGE ALL ENDS
Adjustable Pressure Range+120.0 TO 130.0 POUNDS PER SQUARE INCH LBS
Maximum Operating Temp275.0 FAHRENHEIT SINGLE RESPONSE DEGF
Operating Pressure41.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Style DesignatorDROP-IN CARTRIDGE
Media for Which DesignedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
Valve Operation MethodAUTOMATIC
Valve Discharge Flow Rate3.0 POUNDS PER HOUR LBS
Flow Control DeviceDISK
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
4730-00-189-2729SAE J513 4 010167B INTERCHANGEABLE
Nut,tube Coupling
Sae International Dba Sae International
5325-00-290-66171201-440-Z3C INTERCHANGEABLE
Stud,turnlock Fastener
Southco Inc
5950-01-099-3698240-1998-020 INTERCHANGEABLE
Coil,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5961-01-158-4376 INTERCHANGEABLE
Transistor
5961-01-339-15651853-0553 INTERCHANGEABLE
Transistor
Keysight Technologies Inc
Cross-Reference Index
Part NumberManufacturer
771-624-9104 Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
A440 PRIMARY Ausco Inc (USA)
771-624 Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
Related Parts
4730-00-189-2729INTERCHANGEABLE
NUT,TUBE COUPLING
SAE J513 4 010167B
5325-00-290-6617INTERCHANGEABLE
STUD,TURNLOCK FASTENER
1201-440-Z3C
5950-01-099-3698INTERCHANGEABLE
COIL,RADIO FREQUENCY
240-1998-020
5961-01-158-4376INTERCHANGEABLE
TRANSISTOR
5961-01-339-1565INTERCHANGEABLE
TRANSISTOR
1853-0553

Frequently Asked Questions

What is NSN 4820-01-363-2095?

NSN 4820-01-363-2095 is a Valve,safety Relief, manufactured by Ausco Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-363-2095?

NSN 4820-01-363-2095 has 3 cross-referenced part numbers: 771-624-9104 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix), A440 (Ausco Inc), 771-624 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix).

What NSN replaces 4820-01-363-2095?

There are 5 known substitutes for 4820-01-363-2095: 4730-00-189-2729, 5325-00-290-6617, 5950-01-099-3698 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A440?

Key specifications for A440: Connection Style: GROOVED (DROP-IN CARTRIDGE) ALL ENDS; Connection Type: UNTHREADED CARTRIDGE ALL ENDS; Adjustable Pressure Range: +120.0 TO 130.0 POUNDS PER SQUARE INCH LBS; Maximum Operating Temp: 275.0 FAHRENHEIT SINGLE RESPONSE DEGF. 11 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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