PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51609Seat,valve

Eaton Aerospace Llc Dba Eaton Aerospace Jackson · NSN 4820-01-665-4271 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-665-4271 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-665-4271. Primary manufacturer part number: 51609.
Features
  • Seat,valve — FSC 4820
  • 1 verified cross-reference
  • Primary manufacturer: Eaton Aerospace Llc Dba Eaton Aerospace Jackson
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-665-4271, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Eaton Aerospace Llc Dba Eaton Aerospace Jackson. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-665-4271
Primary Part Number51609
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEaton Aerospace Llc Dba Eaton Aerospace Jackson
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
2805-00-353-79591139373 INTERCHANGEABLE
Guide,valve Stem
Chrysler Realty Company Llc Dba Daimler Chrysler
5340-00-392-7754 INTERCHANGEABLE
Clamp,block
8030-01-630-961751609 INTERCHANGEABLE
Antiseize Compound
Textron Systems Corporation Dba Textron Systems Corp
Cross-Reference Index
Part NumberManufacturer
51609 PRIMARY Eaton Aerospace Llc Dba Eaton Aerospace Jackson (USA)
Related Parts
2805-00-353-7959INTERCHANGEABLE
GUIDE,VALVE STEM
1139373
5340-00-392-7754INTERCHANGEABLE
CLAMP,BLOCK
8030-01-630-9617INTERCHANGEABLE
ANTISEIZE COMPOUND
51609

Frequently Asked Questions

What is NSN 4820-01-665-4271?

NSN 4820-01-665-4271 is a Seat,valve, manufactured by Eaton Aerospace Llc Dba Eaton Aerospace Jackson, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-665-4271?

NSN 4820-01-665-4271 has 1 cross-referenced part number: 51609 (Eaton Aerospace Llc Dba Eaton Aerospace Jackson).

What NSN replaces 4820-01-665-4271?

There are 3 known substitutes for 4820-01-665-4271: 2805-00-353-7959, 5340-00-392-7754, 8030-01-630-9617. Verify interchangeability with system specifications before substitution.

What are the specifications of 51609?

Key specifications for 51609: End Item Identification: F-22 RAPTOR; Part Name Assigned by Controlling Agency: SEAT, VALVE. 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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