PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8994 ITEM 2 4.00IPSDisk,valve

William E Williams Valve Corp · NSN 4820-01-310-4371 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-310-4371 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-310-4371. Primary manufacturer part number: 8994 ITEM 2 4.00IPS.
Features
  • Disk,valve — FSC 4820
  • Material: NICKEL ALLOY
  • Style Designator: SOLID
  • 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 Nickel Alloy construction
General Description

The Disk,valve, cataloged under National Stock Number 4820-01-310-4371, 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 2 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-310-4371
Primary Part Number8994 ITEM 2 4.00IPS
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWilliam E Williams Valve Corp
StatusACTIVE
MaterialNICKEL ALLOY
Style DesignatorSOLID
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5935-00-173-57219729-169 INTERCHANGEABLE
Socket,plug-in Electronic Compon
Eby Group, Llc, the Dba Eby Company Div Eby Company
5360-00-291-51208994 INTERCHANGEABLE
Spring,helical,compression
Arvinmeritor Inc
5935-00-577-2484117788 INTERCHANGEABLE
Plug,tip
Dne Technologies, Inc
5950-01-078-35448994 INTERCHANGEABLE
Reactor
Exxelia Usa, Inc.
4730-01-145-18738994 INTERCHANGEABLE
Reducer,tube
Eg&g, Inc. Optoelectronics Division Div Judson Technologies
4820-01-308-17708994-8-2.5IN INTERCHANGEABLE
Seat,valve
William E Williams Valve Corp
4820-01-310-4256151F-5 4.00IPS 8994 INTERCHANGEABLE
Valve,check
William E Williams Valve Corp
Cross-Reference Index
Part NumberManufacturer
8994 ITEM 2 4.00IPS PRIMARY William E Williams Valve Corp (USA)
8994 William E Williams Valve Corp (USA)
Related Parts
5935-00-173-5721INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
9729-169
5360-00-291-5120INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
8994
5935-00-577-2484INTERCHANGEABLE
PLUG,TIP
117788
5950-01-078-3544INTERCHANGEABLE
REACTOR
8994
4730-01-145-1873INTERCHANGEABLE
REDUCER,TUBE
8994
4820-01-308-1770INTERCHANGEABLE
SEAT,VALVE
8994-8-2.5IN
4820-01-310-4256INTERCHANGEABLE
VALVE,CHECK
151F-5 4.00IPS 8994

Frequently Asked Questions

What is NSN 4820-01-310-4371?

NSN 4820-01-310-4371 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 4820-01-310-4371?

NSN 4820-01-310-4371 has 2 cross-referenced part numbers: 8994 ITEM 2 4.00IPS (William E Williams Valve Corp), 8994 (William E Williams Valve Corp).

What NSN replaces 4820-01-310-4371?

There are 7 known substitutes for 4820-01-310-4371: 5935-00-173-5721, 5360-00-291-5120, 5935-00-577-2484 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8994 ITEM 2 4.00IPS?

Key specifications for 8994 ITEM 2 4.00IPS: Material: NICKEL ALLOY; Style Designator: SOLID. 2 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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