PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

561-03Stem,fluid Valve

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-384-8930 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-384-8930 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-384-8930. Primary manufacturer part number: 561-03.
Features
  • Stem,fluid Valve — FSC 4820
  • Valve Type for Which Designed: REGULATOR
  • Material: NICKEL ALLOY
  • Valve Size for Which Designed: 3.000 INCHES IN
  • Stem Actuating End Type: THREADED EXTERNALLY
  • 3 verified cross-references
  • Primary manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy construction
General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-01-384-8930, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-384-8930
Primary Part Number561-03
Item NameStem,fluid Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
Valve Type for Which DesignedREGULATOR
MaterialNICKEL ALLOY
Valve Size for Which Designed3.000 INCHES IN
Stem Actuating End TypeTHREADED EXTERNALLY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
2805-00-353-592670523C1 INTERCHANGEABLE
Deflector,airflow
Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/
2805-00-353-5927SE126A INTERCHANGEABLE
Deflector,airflow
Wisconsin Motors, Llc
1005-00-420-5105 INTERCHANGEABLE
Pin,firing
5310-00-988-5267 INTERCHANGEABLE
Washer,flat
3120-01-040-486556102 INTERCHANGEABLE
Bearing,plain,self-Aligning
Rbc Transport Dynamics Corp Div Rbc Transport Dynamics
5305-01-194-4775818157-0 INTERCHANGEABLE
Screw,machine
Volvo Penta of the Americas Inc
7010-01-333-0711 INTERCHANGEABLE
Computer System,digital
5996-01-553-739956103 INTERCHANGEABLE
Amplifier Assembly
Aerovironment, Inc. Dba Aerovironment Inc
1610-01-556-146756102-AX INTERCHANGEABLE
Hub Assy,electronic
Aerovironment, Inc. Dba Aerovironment Inc
Cross-Reference Index
Part NumberManufacturer
561-03 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
561-02 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40107-2 PIECE 23 Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
2805-00-353-5926INTERCHANGEABLE
DEFLECTOR,AIRFLOW
70523C1
2805-00-353-5927INTERCHANGEABLE
DEFLECTOR,AIRFLOW
SE126A
1005-00-420-5105INTERCHANGEABLE
PIN,FIRING
5310-00-988-5267INTERCHANGEABLE
WASHER,FLAT
3120-01-040-4865INTERCHANGEABLE
BEARING,PLAIN,SELF-ALIGNING
56102
5305-01-194-4775INTERCHANGEABLE
SCREW,MACHINE
818157-0
7010-01-333-0711INTERCHANGEABLE
COMPUTER SYSTEM,DIGITAL
5996-01-553-7399INTERCHANGEABLE
AMPLIFIER ASSEMBLY
56103
1610-01-556-1467INTERCHANGEABLE
HUB ASSY,ELECTRONIC
56102-AX

Frequently Asked Questions

What is NSN 4820-01-384-8930?

NSN 4820-01-384-8930 is a Stem,fluid Valve, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-384-8930?

NSN 4820-01-384-8930 has 3 cross-referenced part numbers: 561-03 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 561-02 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40107-2 PIECE 23 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-384-8930?

There are 9 known substitutes for 4820-01-384-8930: 2805-00-353-5926, 2805-00-353-5927, 1005-00-420-5105 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 561-03?

Key specifications for 561-03: Valve Type for Which Designed: REGULATOR; Material: NICKEL ALLOY; Overall Length: 5.125 INCHES NOMINAL IN; Valve Size for Which Designed: 3.000 INCHES IN. 5 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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