PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

78304Seat,valve

Cooper Industries Inc Flow Control Div · NSN 4820-00-295-7111 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-295-7111 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-295-7111. Primary manufacturer part number: 78304.
Features
  • Seat,valve — FSC 4820
  • Body Outside Diameter: 1.990 INCHES NOMINAL IN
  • Material: PLASTIC OVERALL
  • Seating Surface Shape: ANGULAR
  • Style Designator: PLAIN
  • Seat Angle in Deg: 44.000 NOMINAL
  • Body Inside Diameter: 1.638 INCHES NOMINAL IN
  • 1 verified cross-reference
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Plastic Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-295-7111, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Cooper Industries Inc Flow Control Div. Government technical data includes 6 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-295-7111
Primary Part Number78304
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCooper Industries Inc Flow Control Div
StatusACTIVE
Body Outside Diameter1.990 INCHES NOMINAL IN
MaterialPLASTIC OVERALL
Seating Surface ShapeANGULAR
Style DesignatorPLAIN
Seat Angle in Deg44.000 NOMINAL
Body Inside Diameter1.638 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5420-00-377-0769 INTERCHANGEABLE
Pin,latch,transom
5420-00-377-0773 INTERCHANGEABLE
Pin,transom
5330-00-446-383478304 INTERCHANGEABLE
Gasket
Cooper Machinery Services Llc
5331-01-466-353278304 INTERCHANGEABLE
O-Ring
Paccar Winch Inc Dba Paccar Winch Division
Cross-Reference Index
Part NumberManufacturer
78304 Cooper Industries Inc Flow Control Div (USA)
Related Parts
5420-00-377-0769INTERCHANGEABLE
PIN,LATCH,TRANSOM
5420-00-377-0773INTERCHANGEABLE
PIN,TRANSOM
5330-00-446-3834INTERCHANGEABLE
GASKET
78304
5331-01-466-3532INTERCHANGEABLE
O-RING
78304

Frequently Asked Questions

What is NSN 4820-00-295-7111?

NSN 4820-00-295-7111 is a Seat,valve, manufactured by Cooper Industries Inc Flow Control Div, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-295-7111?

NSN 4820-00-295-7111 has 1 cross-referenced part number: 78304 (Cooper Industries Inc Flow Control Div).

What NSN replaces 4820-00-295-7111?

There are 4 known substitutes for 4820-00-295-7111: 5420-00-377-0769, 5420-00-377-0773, 5330-00-446-3834 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 78304?

Key specifications for 78304: Body Outside Diameter: 1.990 INCHES NOMINAL IN; Material: PLASTIC OVERALL; Seating Surface Shape: ANGULAR; Style Designator: PLAIN. 7 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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