PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

378002Valve,safety Relief

Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix · NSN 4820-00-051-6799 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-051-6799 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-051-6799. Primary manufacturer part number: 378002.
Features
  • Valve,safety Relief — FSC 4820
  • Maximum Operating Temp: 600.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Valve Operation Method: MANUAL
  • Style Designator: STRAIGHT THRU
  • Material: STEEL CORROSION RESISTING OVERALL
  • Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
  • Operating Pressure: 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Nominal Outside Diameter Tube Accommodated: 0.375 INCHES ALL ENDS IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-051-6799, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-051-6799
Primary Part Number378002
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHoneywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
StatusCANCELLED
Maximum Operating Temp600.0 FAHRENHEIT SINGLE RESPONSE DEGF
Valve Operation MethodMANUAL
Style DesignatorSTRAIGHT THRU
MaterialSTEEL CORROSION RESISTING OVERALL
Media for Which DesignedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
Operating Pressure100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Outside Diameter Tube Accommodated0.375 INCHES ALL ENDS IN
Nominal Thread Size0.562 INCHES ALL ENDS IN
Seat Angle37.0 DEGREES ALL ENDS
Features ProvidedPRESSURE TIGHT OUTLET SIDE
Thread Quantity Per Inch18 ALL ENDS
Thread Series DesignatorUNF FIRST END
Thread Class3A ALL ENDS A
Disk Loading MethodSPRING
Flow Control DevicePOPPET
Connection StyleFLARED (TUBE) ALL ENDS
Thread DirectionRIGHT-HAND ALL ENDS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
4820-00-306-485027800 INTERCHANGEABLE
Valve,plug
Woodward Hrt Inc
4130-00-851-4408378-015 INTERCHANGEABLE
Filter Element,air Conditioning
Tektronix, Inc.
2920-00-946-84962D1508 INTERCHANGEABLE
Rotor,ignition Distributor
Caterpillar Inc Div Caterpillar Defense
3110-00-948-9796MS19061-20013 INTERCHANGEABLE
Ball,bearing
American Society for Testing and Materials Dba Astm International
Cross-Reference Index
Part NumberManufacturer
378002 PRIMARY Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
378002 Alliedsignal Inc Dba Allied-Signal Aerospace Co (USA)
SS378002 PRIMARY Service & Sales Inc (USA)
K-1260-6-1 Essex Industries, Inc. Dba Essex Industries (USA)
2D1508 PRIMARY Crissair Inc Div Esco Technologies (USA)
378002 PRIMARY Honeywell International Inc. Div Aerospace - Torrance (USA)
Related Parts
4820-00-306-4850INTERCHANGEABLE
VALVE,PLUG
27800
4130-00-851-4408INTERCHANGEABLE
FILTER ELEMENT,AIR CONDITIONING
378-015
2920-00-946-8496INTERCHANGEABLE
ROTOR,IGNITION DISTRIBUTOR
2D1508
3110-00-948-9796INTERCHANGEABLE
BALL,BEARING
MS19061-20013

Frequently Asked Questions

What is NSN 4820-00-051-6799?

NSN 4820-00-051-6799 is a Valve,safety Relief, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-051-6799?

NSN 4820-00-051-6799 has 6 cross-referenced part numbers: 378002 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix), 378002 (Alliedsignal Inc Dba Allied-Signal Aerospace Co), SS378002 (Service & Sales Inc), K-1260-6-1 (Essex Industries, Inc. Dba Essex Industries), 2D1508 (Crissair Inc Div Esco Technologies) and 1 more.

What NSN replaces 4820-00-051-6799?

There are 4 known substitutes for 4820-00-051-6799: 4820-00-306-4850, 4130-00-851-4408, 2920-00-946-8496 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 378002?

Key specifications for 378002: Maximum Operating Temp: 600.0 FAHRENHEIT SINGLE RESPONSE DEGF; Valve Operation Method: MANUAL; Style Designator: STRAIGHT THRU; Material: STEEL CORROSION RESISTING OVERALL. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-051-6799 still in active supply?

NSN 4820-00-051-6799 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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