PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18802Seat,valve

Schneider Electric Systems Usa Inc · NSN 4820-00-799-1442 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-799-1442 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-799-1442. Primary manufacturer part number: 18802.
Features
  • Seat,valve — FSC 4820
  • Flange Diameter: 2.969 INCHES NOMINAL IN
  • Seat Angle in Deg: 45.000 NOMINAL
  • Under Flange Height: 0.510 INCHES NOMINAL IN
  • Material: NICKEL ALLOY OVERALL
  • Seating Surface Shape: ANGULAR
  • Style Designator: THREADED FLANGED
  • Thread Class: 2A SINGLE THREADED PORTION A
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-799-1442, 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 12 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-799-1442
Primary Part Number18802
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSchneider Electric Systems Usa Inc
StatusACTIVE
Flange Diameter2.969 INCHES NOMINAL IN
Seat Angle in Deg45.000 NOMINAL
Under Flange Height0.510 INCHES NOMINAL IN
MaterialNICKEL ALLOY OVERALL
Seating Surface ShapeANGULAR
Style DesignatorTHREADED FLANGED
Thread Class2A SINGLE THREADED PORTION A
Nominal Thread Size2.750 INCHES SINGLE THREADED PORTION IN
Flange Seat to Disk End Height0.430 INCHES NOMINAL IN
Thread Quantity Per Inch12 SINGLE THREADED PORTION
Thread Series DesignatorUN SINGLE THREADED PORTION
Body Inside Diameter2.325 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
2910-00-062-4204 INTERCHANGEABLE
Parts Kit,carburetor
5305-00-834-299254A50A67 INTERCHANGEABLE
Setscrew
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
5120-00-953-340921C2404P017 INTERCHANGEABLE
Crowfoot Attachment,socket Wrenc
General Electric Company
5950-01-023-3084678-0201-020 INTERCHANGEABLE
Reactor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
2540-01-132-6986 INTERCHANGEABLE
Blade,windshield Wiper
6660-01-443-111118802 INTERCHANGEABLE
Anemometer
R. M. Young Company Llc
5905-01-499-1235 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
5325-01-571-2438AKS4T-610-4.2 INTERCHANGEABLE
Insert,screw Thread
Avk Industries Products Inc
Cross-Reference Index
Part NumberManufacturer
18802 PRIMARY Schneider Electric Systems Usa Inc (USA)
Related Parts
2910-00-062-4204INTERCHANGEABLE
PARTS KIT,CARBURETOR
5305-00-834-2992INTERCHANGEABLE
SETSCREW
54A50A67
5120-00-953-3409INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC
21C2404P017
5950-01-023-3084INTERCHANGEABLE
REACTOR
678-0201-020
2540-01-132-6986INTERCHANGEABLE
BLADE,WINDSHIELD WIPER
6660-01-443-1111INTERCHANGEABLE
ANEMOMETER
18802
5905-01-499-1235INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
5325-01-571-2438INTERCHANGEABLE
INSERT,SCREW THREAD
AKS4T-610-4.2

Frequently Asked Questions

What is NSN 4820-00-799-1442?

NSN 4820-00-799-1442 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 4820-00-799-1442?

NSN 4820-00-799-1442 has 1 cross-referenced part number: 18802 (Schneider Electric Systems Usa Inc).

What NSN replaces 4820-00-799-1442?

There are 8 known substitutes for 4820-00-799-1442: 2910-00-062-4204, 5305-00-834-2992, 5120-00-953-3409 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18802?

Key specifications for 18802: Flange Diameter: 2.969 INCHES NOMINAL IN; Seat Angle in Deg: 45.000 NOMINAL; Under Flange Height: 0.510 INCHES NOMINAL IN; Material: NICKEL ALLOY OVERALL. 12 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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