PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11889NPC22Seat,valve

Classic Mfg · NSN 4820-01-204-5245 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-204-5245 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-204-5245. Primary manufacturer part number: 11889NPC22.
Features
  • Seat,valve — FSC 4820
  • Material: COPPER ALLOY SEAT
  • 5 verified cross-references
  • Primary manufacturer: Classic Mfg
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Seat construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-204-5245, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Classic Mfg. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-204-5245
Primary Part Number11889NPC22
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerClassic Mfg
StatusACTIVE
MaterialCOPPER ALLOY SEAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5305-00-639-695923403 INTERCHANGEABLE
Screw,machine
Briggs and Stratton Corp
4820-00-647-2328146-00318-1 INTERCHANGEABLE
Seat,valve
Grove Valve Operations
3455-00-971-890817614 INTERCHANGEABLE
Cutter,milling,end
New York Twist Drill Inc
5998-01-137-099423403 INTERCHANGEABLE
Circuit Card Assembly
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
4720-01-268-7399 INTERCHANGEABLE
Tubing Assembly,nonmetallic
5985-01-276-27072898679-6 INTERCHANGEABLE
Coupler,directional
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
4940-01-451-939134015-01 INTERCHANGEABLE
Enclosure,electromagnetic Shield
Electronic Marine Systems, Inc.
4820-01-517-3083 INTERCHANGEABLE
Valve,check
5340-01-699-620223-403 INTERCHANGEABLE
Cover,access
DC Fabricators Inc
Cross-Reference Index
Part NumberManufacturer
11889NPC22 PRIMARY Classic Mfg (USA)
23403 Valcon Sales and Services Inc (USA)
N23403 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
11889N PIECE 22 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
23403 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
5305-00-639-6959INTERCHANGEABLE
SCREW,MACHINE
23403
4820-00-647-2328INTERCHANGEABLE
SEAT,VALVE
146-00318-1
3455-00-971-8908INTERCHANGEABLE
CUTTER,MILLING,END
17614
5998-01-137-0994INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
23403
4720-01-268-7399INTERCHANGEABLE
TUBING ASSEMBLY,NONMETALLIC
5985-01-276-2707INTERCHANGEABLE
COUPLER,DIRECTIONAL
2898679-6
4940-01-451-9391INTERCHANGEABLE
ENCLOSURE,ELECTROMAGNETIC SHIELD
34015-01
4820-01-517-3083INTERCHANGEABLE
VALVE,CHECK
5340-01-699-6202INTERCHANGEABLE
COVER,ACCESS
23-403

Frequently Asked Questions

What is NSN 4820-01-204-5245?

NSN 4820-01-204-5245 is a Seat,valve, manufactured by Classic Mfg, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-204-5245?

NSN 4820-01-204-5245 has 5 cross-referenced part numbers: 11889NPC22 (Classic Mfg), 23403 (Valcon Sales and Services Inc), N23403 (Leslie Controls, Inc. Dba Leslie Controls Inc), 11889N PIECE 22 (Leslie Controls, Inc. Dba Leslie Controls Inc), 23403 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-204-5245?

There are 9 known substitutes for 4820-01-204-5245: 5305-00-639-6959, 4820-00-647-2328, 3455-00-971-8908 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11889NPC22?

Key specifications for 11889NPC22: Material: COPPER ALLOY SEAT. 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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