PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3402-51Seat,valve

Norgren C a Co · NSN 4820-01-203-4744 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-203-4744 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-203-4744. Primary manufacturer part number: 3402-51.
Features
  • Seat,valve — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Norgren C a Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-203-4744, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Norgren C a Co. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSeat,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersNorgren C a Co (CAGE 43990)
Technical Specifications
ParameterValue
NSN4820-01-203-4744
Primary Part Number3402-51
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNorgren C a Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
2530-00-026-859934025-1 INTERCHANGEABLE
Cable Assembly,brake
Saginaw Products Corporation Dba Cignys
1560-00-571-0576340288 INTERCHANGEABLE
Support,structural Component,air
Lockheed Martin Corp
5920-00-818-1592344250 INTERCHANGEABLE
Fuseholder,extractor Post
Littelfuse, Inc.
5340-00-990-3186NAS1382-1 INTERCHANGEABLE
Loop,strap Fastener
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
4730-01-297-9221340288 INTERCHANGEABLE
Spool Piece
Eaton Aerospace, Llc Dba Jackson South
Cross-Reference Index
Part NumberManufacturer
3402-51 PRIMARY Norgren C a Co (USA)
3402-88 Norgren C a Co (USA)
Related Parts
2530-00-026-8599INTERCHANGEABLE
CABLE ASSEMBLY,BRAKE
34025-1
1560-00-571-0576INTERCHANGEABLE
SUPPORT,STRUCTURAL COMPONENT,AIR
340288
5920-00-818-1592INTERCHANGEABLE
FUSEHOLDER,EXTRACTOR POST
344250
5340-00-990-3186INTERCHANGEABLE
LOOP,STRAP FASTENER
NAS1382-1
4730-01-297-9221INTERCHANGEABLE
SPOOL PIECE
340288

Frequently Asked Questions

What is NSN 4820-01-203-4744?

NSN 4820-01-203-4744 is a Seat,valve, manufactured by Norgren C a Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-203-4744?

NSN 4820-01-203-4744 has 2 cross-referenced part numbers: 3402-51 (Norgren C a Co), 3402-88 (Norgren C a Co).

What NSN replaces 4820-01-203-4744?

There are 5 known substitutes for 4820-01-203-4744: 2530-00-026-8599, 1560-00-571-0576, 5920-00-818-1592 and 2 more. Verify interchangeability with system specifications before substitution.

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