PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

561-01Stem,fluid Valve

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-266-2112 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-266-2112 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-266-2112. Primary manufacturer part number: 561-01.
Features
  • Stem,fluid Valve — FSC 4820
  • Material: STEEL COMP 303
  • 1 verified cross-reference
  • 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 Steel Comp 303 construction
General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-01-266-2112, 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 1 verified specification, 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-266-2112
Primary Part Number561-01
Item NameStem,fluid Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTrac Regulator Co., Inc. Dba Trac Regulator Co Inc
StatusACTIVE
MaterialSTEEL COMP 303
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5330-00-017-610256101 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
6660-00-909-03165610 INTERCHANGEABLE
Tipping Bucket Assy
Belfort Instrument Company
5305-00-988-1723MS35206-279 INTERCHANGEABLE
Screw,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5895-01-556-120856101 INTERCHANGEABLE
Joystick,data Entry
Aerovironment, Inc. Dba Aerovironment Inc
8465-01-621-941456101 INTERCHANGEABLE
Handcuffs
Armament Systems and Procedures Inc
6515-01-642-3192 INTERCHANGEABLE
Applicator,ear
Cross-Reference Index
Part NumberManufacturer
561-01 PRIMARY Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
Related Parts
5330-00-017-6102INTERCHANGEABLE
SEAL,PLAIN ENCASED
56101
6660-00-909-0316INTERCHANGEABLE
TIPPING BUCKET ASSY
5610
5305-00-988-1723INTERCHANGEABLE
SCREW,MACHINE
MS35206-279
5895-01-556-1208INTERCHANGEABLE
JOYSTICK,DATA ENTRY
56101
8465-01-621-9414INTERCHANGEABLE
HANDCUFFS
56101
6515-01-642-3192INTERCHANGEABLE
APPLICATOR,EAR

Frequently Asked Questions

What is NSN 4820-01-266-2112?

NSN 4820-01-266-2112 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 4820-01-266-2112?

NSN 4820-01-266-2112 has 1 cross-referenced part number: 561-01 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).

What NSN replaces 4820-01-266-2112?

There are 6 known substitutes for 4820-01-266-2112: 5330-00-017-6102, 6660-00-909-0316, 5305-00-988-1723 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 561-01?

Key specifications for 561-01: Material: STEEL COMP 303; Overall Length: 5.125 INCHES NOMINAL IN. 2 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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