PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21427Seat,valve

Schneider Electric Systems Usa Inc · NSN 4820-00-066-5606 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-066-5606 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-066-5606. Primary manufacturer part number: 21427.
Features
  • Seat,valve — FSC 4820
  • Material: STEEL COMP 303 OVERALL
  • Material Document and Classification: MS-2901 MIL STD SINGLE MATERIAL RESPONSE OVERALL
  • 1 verified cross-reference
  • Primary manufacturer: Schneider Electric Systems Usa Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 303 Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-066-5606, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Schneider Electric Systems Usa Inc. Government technical data includes 2 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-066-5606
Primary Part Number21427
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSchneider Electric Systems Usa Inc
StatusACTIVE
MaterialSTEEL COMP 303 OVERALL
Material Document and ClassificationMS-2901 MIL STD SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5935-00-125-06902142-7 INTERCHANGEABLE
Jack,tip
Fluke Electronics Corp
3120-00-938-579021-427 INTERCHANGEABLE
Bearing,sleeve
Dresser Industries Inc Leroi Div
2920-01-240-2797PS-1464S INTERCHANGEABLE
Housing,engine Drive,electrical
Prestolite Electric Inc
5950-01-263-51892914642-1 INTERCHANGEABLE
Coil,radio Frequency
Raytheon Company Dba Raytheon Co
Cross-Reference Index
Part NumberManufacturer
21427 PRIMARY Schneider Electric Systems Usa Inc (USA)
Related Parts
5935-00-125-0690INTERCHANGEABLE
JACK,TIP
2142-7
3120-00-938-5790INTERCHANGEABLE
BEARING,SLEEVE
21-427
2920-01-240-2797INTERCHANGEABLE
HOUSING,ENGINE DRIVE,ELECTRICAL
PS-1464S
5950-01-263-5189INTERCHANGEABLE
COIL,RADIO FREQUENCY
2914642-1

Frequently Asked Questions

What is NSN 4820-00-066-5606?

NSN 4820-00-066-5606 is a Seat,valve, manufactured by Schneider Electric Systems Usa Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-066-5606?

NSN 4820-00-066-5606 has 1 cross-referenced part number: 21427 (Schneider Electric Systems Usa Inc).

What NSN replaces 4820-00-066-5606?

There are 4 known substitutes for 4820-00-066-5606: 5935-00-125-0690, 3120-00-938-5790, 2920-01-240-2797 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21427?

Key specifications for 21427: Material: STEEL COMP 303 OVERALL; Material Document and Classification: MS-2901 MIL STD SINGLE MATERIAL RESPONSE OVERALL. 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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