PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7995-2Disk,valve

William E Williams Valve Corp · NSN 4820-01-278-6280 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-278-6280 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-278-6280. Primary manufacturer part number: 7995-2.
Features
  • Disk,valve — FSC 4820
  • Media for Which Designed: STEAM OR OIL OR GAS
  • Temp Rating: 150.0 FAHRENHEIT MINIMUM AND 406.0 FAHRENHEIT MAXIMUM DEGF
  • Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • Style Designator: SOLID WEDGE
  • Material: COPPER ALLOY
  • 4 verified cross-references
  • Primary manufacturer: William E Williams Valve Corp
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy construction
General Description

The Disk,valve, cataloged under National Stock Number 4820-01-278-6280, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is William E Williams Valve Corp. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-278-6280
Primary Part Number7995-2
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWilliam E Williams Valve Corp
StatusCANCELLED
Media for Which DesignedSTEAM OR OIL OR GAS
Temp Rating150.0 FAHRENHEIT MINIMUM AND 406.0 FAHRENHEIT MAXIMUM DEGF
Pressure Rating150.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Style DesignatorSOLID WEDGE
MaterialCOPPER ALLOY
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5935-00-201-2755CV799-5 INTERCHANGEABLE
Adapter,connector
Winchester Interconnect Corporation
3120-00-808-2171B32L INTERCHANGEABLE
Bearing,plain,self-Aligning
Rbc Bearings Incorporated Div West Trenton Division
5330-00-932-391879952 INTERCHANGEABLE
Packing,preformed
Donaldson Company, Inc.
5330-00-946-7938799528 INTERCHANGEABLE
Seal,plain Encased
Dana Off Highway Products, Llc
5998-01-080-214379952 INTERCHANGEABLE
Circuit Card Assembly
Drs Signal Solutions, Inc.
4820-01-278-62287995-15 INTERCHANGEABLE
Stem,fluid Valve
William E Williams Valve Corp
4820-01-278-73977995 ITEM 3 8IN INTERCHANGEABLE
Seat,valve
William E Williams Valve Corp
4820-01-293-86027995-2 5IN INTERCHANGEABLE
Disk,valve
William E Williams Valve Corp
4820-01-294-17857995-3 5IN INTERCHANGEABLE
Seat,valve
William E Williams Valve Corp
4820-01-294-72487995-15 5IN INTERCHANGEABLE
Stem,fluid Valve
William E Williams Valve Corp
Cross-Reference Index
Part NumberManufacturer
7995-2 PRIMARY William E Williams Valve Corp (USA)
7995 William E Williams Valve Corp (USA)
7995 ITEM 2 8IN William E Williams Valve Corp (USA)
7995-2-8 PRIMARY William E Williams Valve Corp (USA)
Related Parts
5935-00-201-2755INTERCHANGEABLE
ADAPTER,CONNECTOR
CV799-5
3120-00-808-2171INTERCHANGEABLE
BEARING,PLAIN,SELF-ALIGNING
B32L
5330-00-932-3918INTERCHANGEABLE
PACKING,PREFORMED
79952
5330-00-946-7938INTERCHANGEABLE
SEAL,PLAIN ENCASED
799528
5998-01-080-2143INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
79952
4820-01-278-6228INTERCHANGEABLE
STEM,FLUID VALVE
7995-15
4820-01-278-7397INTERCHANGEABLE
SEAT,VALVE
7995 ITEM 3 8IN
4820-01-293-8602INTERCHANGEABLE
DISK,VALVE
7995-2 5IN
4820-01-294-1785INTERCHANGEABLE
SEAT,VALVE
7995-3 5IN
4820-01-294-7248INTERCHANGEABLE
STEM,FLUID VALVE
7995-15 5IN
4820-01-294-9517INTERCHANGEABLE
VALVE,GATE
B112A2 1/2 INCH
4820-01-294-9518INTERCHANGEABLE
VALVE,GATE
7995 ITEM 141F 5IN

Frequently Asked Questions

What is NSN 4820-01-278-6280?

NSN 4820-01-278-6280 is a Disk,valve, manufactured by William E Williams Valve Corp, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-278-6280?

NSN 4820-01-278-6280 has 4 cross-referenced part numbers: 7995-2 (William E Williams Valve Corp), 7995 (William E Williams Valve Corp), 7995 ITEM 2 8IN (William E Williams Valve Corp), 7995-2-8 (William E Williams Valve Corp).

What NSN replaces 4820-01-278-6280?

There are 12 known substitutes for 4820-01-278-6280: 5935-00-201-2755, 3120-00-808-2171, 5330-00-932-3918 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7995-2?

Key specifications for 7995-2: Media for Which Designed: STEAM OR OIL OR GAS; Temp Rating: 150.0 FAHRENHEIT MINIMUM AND 406.0 FAHRENHEIT MAXIMUM DEGF; Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Style Designator: SOLID WEDGE. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-278-6280 still in active supply?

NSN 4820-01-278-6280 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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