PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4403Seat,valve

Circor Aerospace, Inc. Dba Circor Aerospace Inc · NSN 4820-01-137-5906 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-137-5906 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-137-5906. Primary manufacturer part number: 4403.
Features
  • Seat,valve — FSC 4820
  • Material: STEEL CORROSION RESISTING OVERALL
  • 4 verified cross-references
  • Primary manufacturer: Circor Aerospace, Inc. Dba Circor Aerospace Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-137-5906, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Aerospace, Inc. Dba Circor Aerospace Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-137-5906
Primary Part Number4403
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCircor Aerospace, Inc. Dba Circor Aerospace Inc
StatusACTIVE
MaterialSTEEL CORROSION RESISTING OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5120-00-133-0534 INTERCHANGEABLE
Die,crimping Tool
5340-00-246-3405 INTERCHANGEABLE
Clip,retaining
5315-00-291-2588 INTERCHANGEABLE
Pin,straight,headed
5905-00-295-3574 INTERCHANGEABLE
Resistor,adjustable
5985-00-404-55392913939-2 INTERCHANGEABLE
Attenuator,fixed
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5120-00-409-52254403 INTERCHANGEABLE
Die,crimping Tool
Abb Installation Products Inc
6760-00-434-3491 INTERCHANGEABLE
Head,camera,photographic
5940-00-604-7690BW440-3S INTERCHANGEABLE
Terminal
Bergen Cable Technology, Inc.
5930-00-932-96084403 INTERCHANGEABLE
Switch,push
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
5940-00-983-6044 INTERCHANGEABLE
Terminal Board
Cross-Reference Index
Part NumberManufacturer
4450 FLGPC19 Atkomatic Valve Co Inc (USA)
4403 Atkomatic Valve Co Inc (USA)
4403 PRIMARY Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
4450 FLGPC19 PRIMARY Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
Related Parts
5120-00-133-0534INTERCHANGEABLE
DIE,CRIMPING TOOL
5340-00-246-3405INTERCHANGEABLE
CLIP,RETAINING
5315-00-291-2588INTERCHANGEABLE
PIN,STRAIGHT,HEADED
5905-00-295-3574INTERCHANGEABLE
RESISTOR,ADJUSTABLE
5985-00-404-5539INTERCHANGEABLE
ATTENUATOR,FIXED
2913939-2
5120-00-409-5225INTERCHANGEABLE
DIE,CRIMPING TOOL
4403
6760-00-434-3491INTERCHANGEABLE
HEAD,CAMERA,PHOTOGRAPHIC
5940-00-604-7690INTERCHANGEABLE
TERMINAL
BW440-3S
5930-00-932-9608INTERCHANGEABLE
SWITCH,PUSH
4403
5940-00-983-6044INTERCHANGEABLE
TERMINAL BOARD
5985-01-193-6695INTERCHANGEABLE
ATTENUATOR,FIXED
5805-01-293-8302INTERCHANGEABLE
TELEPHONE SET
248-01 ALT 1

Frequently Asked Questions

What is NSN 4820-01-137-5906?

NSN 4820-01-137-5906 is a Seat,valve, manufactured by Circor Aerospace, Inc. Dba Circor Aerospace Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-137-5906?

NSN 4820-01-137-5906 has 4 cross-referenced part numbers: 4450 FLGPC19 (Atkomatic Valve Co Inc), 4403 (Atkomatic Valve Co Inc), 4403 (Circor Aerospace, Inc. Dba Circor Aerospace Inc), 4450 FLGPC19 (Circor Aerospace, Inc. Dba Circor Aerospace Inc).

What NSN replaces 4820-01-137-5906?

There are 12 known substitutes for 4820-01-137-5906: 5120-00-133-0534, 5340-00-246-3405, 5315-00-291-2588 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4403?

Key specifications for 4403: Material: STEEL CORROSION RESISTING OVERALL. 1 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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