PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21562Seat,valve

Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems · NSN 4820-01-096-3197 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-096-3197 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-096-3197. Primary manufacturer part number: 21562.
Features
  • Seat,valve — FSC 4820
  • Seat Angle in Deg: 45.000 NOMINAL
  • Material: STEEL OVERALL
  • Surface Treatment: NICKEL OVERALL
  • Seating Surface Shape: ANGULAR
  • Style Designator: PLAIN
  • Body Outside Diameter: 1.432 INCHES NOMINAL IN
  • Body Inside Diameter: 1.076 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-096-3197, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, 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
NSN4820-01-096-3197
Primary Part Number21562
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerStanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
StatusACTIVE
Seat Angle in Deg45.000 NOMINAL
MaterialSTEEL OVERALL
Surface TreatmentNICKEL OVERALL
Seating Surface ShapeANGULAR
Style DesignatorPLAIN
Body Outside Diameter1.432 INCHES NOMINAL IN
Body Inside Diameter1.076 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5998-00-234-18162156-2 INTERCHANGEABLE
Circuit Card Assembly
Mission Systems Davenport Inc.
3455-01-179-366550-10349 INTERCHANGEABLE
Reamer,machine
Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039
6685-01-378-669521B-10-B-H-24-B-4 INTERCHANGEABLE
Thermocouple,immersion
Rdf Corporation
6625-01-686-356321562 INTERCHANGEABLE
Lead,test
Faro Technologies Inc
Cross-Reference Index
Part NumberManufacturer
21562 Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems (USA)
21562 Sycon Corp Startmaster Div (USA)
Related Parts
5998-00-234-1816INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
2156-2
3455-01-179-3665INTERCHANGEABLE
REAMER,MACHINE
50-10349
6685-01-378-6695INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
21B-10-B-H-24-B-4
6625-01-686-3563INTERCHANGEABLE
LEAD,TEST
21562

Frequently Asked Questions

What is NSN 4820-01-096-3197?

NSN 4820-01-096-3197 is a Seat,valve, manufactured by Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-096-3197?

NSN 4820-01-096-3197 has 2 cross-referenced part numbers: 21562 (Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems), 21562 (Sycon Corp Startmaster Div).

What NSN replaces 4820-01-096-3197?

There are 4 known substitutes for 4820-01-096-3197: 5998-00-234-1816, 3455-01-179-3665, 6685-01-378-6695 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21562?

Key specifications for 21562: Overall Height: 0.375 INCHES NOMINAL IN; Seat Angle in Deg: 45.000 NOMINAL; Material: STEEL OVERALL; Surface Treatment: NICKEL OVERALL. 9 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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