PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7878 ITEM 2 4INDisk,valve

William E Williams Valve Corp · NSN 4820-01-210-1393 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-210-1393 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-210-1393. Primary manufacturer part number: 7878 ITEM 2 4IN.
Features
  • Disk,valve — FSC 4820
  • Style Designator: SOLID WEDGE
  • Temp Rating: 500.0 FAHRENHEIT NOMINAL DEGF
  • Material: STEEL
  • Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
  • 2 verified cross-references
  • Primary manufacturer: William E Williams Valve Corp
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel construction
General Description

The Disk,valve, cataloged under National Stock Number 4820-01-210-1393, 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 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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: Active.

Technical Specifications
ParameterValue
NSN4820-01-210-1393
Primary Part Number7878 ITEM 2 4IN
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWilliam E Williams Valve Corp
StatusACTIVE
Style DesignatorSOLID WEDGE
Temp Rating500.0 FAHRENHEIT NOMINAL DEGF
MaterialSTEEL
Pressure Rating150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5325-00-276-6089 INTERCHANGEABLE
Grommet,nonmetallic
3120-00-343-25307878 INTERCHANGEABLE
Bearing,sleeve
Cooper Machinery Services Llc
5305-00-477-3268 INTERCHANGEABLE
Setscrew
5950-00-648-6167 INTERCHANGEABLE
Transformer,power
4820-01-124-67827878 ITEM 5 5IN INTERCHANGEABLE
Stem,fluid Valve
William E Williams Valve Corp
4820-01-127-25957878 NO 3 INTERCHANGEABLE
Seat,valve
William E Williams Valve Corp
4820-01-178-30907878 ITEM 5-2IN INTERCHANGEABLE
Stem,fluid Valve
William E Williams Valve Corp
4820-01-178-70237878 ITEM 3 INTERCHANGEABLE
Seat,valve
William E Williams Valve Corp
4820-01-182-08267878 ITEM 3 4IN INTERCHANGEABLE
Seat,valve
William E Williams Valve Corp
4820-01-182-16897878-6IN INTERCHANGEABLE
Valve,gate
William E Williams Valve Corp
Cross-Reference Index
Part NumberManufacturer
7878 ITEM 2 4IN PRIMARY William E Williams Valve Corp (USA)
7878 William E Williams Valve Corp (USA)
Related Parts
5325-00-276-6089INTERCHANGEABLE
GROMMET,NONMETALLIC
3120-00-343-2530INTERCHANGEABLE
BEARING,SLEEVE
7878
5305-00-477-3268INTERCHANGEABLE
SETSCREW
5950-00-648-6167INTERCHANGEABLE
TRANSFORMER,POWER
4820-01-124-6782INTERCHANGEABLE
STEM,FLUID VALVE
7878 ITEM 5 5IN
4820-01-127-2595INTERCHANGEABLE
SEAT,VALVE
7878 NO 3
4820-01-178-3090INTERCHANGEABLE
STEM,FLUID VALVE
7878 ITEM 5-2IN
4820-01-178-7023INTERCHANGEABLE
SEAT,VALVE
7878 ITEM 3
4820-01-182-0826INTERCHANGEABLE
SEAT,VALVE
7878 ITEM 3 4IN
4820-01-182-1689INTERCHANGEABLE
VALVE,GATE
7878-6IN
4820-01-184-4278INTERCHANGEABLE
SEAT,VALVE
7878 ITEM 3 3 IN
4820-01-210-4338INTERCHANGEABLE
STEM,FLUID VALVE
7878 ITEM 5 4IN

Frequently Asked Questions

What is NSN 4820-01-210-1393?

NSN 4820-01-210-1393 is a Disk,valve, manufactured by William E Williams Valve Corp, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-210-1393?

NSN 4820-01-210-1393 has 2 cross-referenced part numbers: 7878 ITEM 2 4IN (William E Williams Valve Corp), 7878 (William E Williams Valve Corp).

What NSN replaces 4820-01-210-1393?

There are 12 known substitutes for 4820-01-210-1393: 5325-00-276-6089, 3120-00-343-2530, 5305-00-477-3268 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7878 ITEM 2 4IN?

Key specifications for 7878 ITEM 2 4IN: Style Designator: SOLID WEDGE; Temp Rating: 500.0 FAHRENHEIT NOMINAL DEGF; Material: STEEL; Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS. 4 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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