PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8558-0-63Stem,fluid Valve

Velan Valve Corp. · NSN 4820-01-289-8351 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-289-8351 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-289-8351. Primary manufacturer part number: 8558-0-63.
Features
  • Stem,fluid Valve — FSC 4820
  • Valve Type for Which Designed: GATE
  • Largest Outside Diameter: 2.188 INCHES NOMINAL IN
  • Valve Size for Which Designed: 12.000 INCHES IN
  • Material: STEEL COMP 410
  • Stem Actuating End Type: THREADED EXTERNALLY
  • 3 verified cross-references
  • Primary manufacturer: Velan Valve Corp.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 410 construction
General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-01-289-8351, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Velan Valve Corp.. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-289-8351
Primary Part Number8558-0-63
Item NameStem,fluid Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerVelan Valve Corp.
StatusACTIVE
Valve Type for Which DesignedGATE
Largest Outside Diameter2.188 INCHES NOMINAL IN
Valve Size for Which Designed12.000 INCHES IN
MaterialSTEEL COMP 410
Stem Actuating End TypeTHREADED EXTERNALLY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5365-00-592-026713480 INTERCHANGEABLE
Bushing,nonmetallic
Tenneco Inc
4820-01-143-57418553-001-065 INTERCHANGEABLE
Stem,fluid Valve
Velan Valve Corp.
4820-01-273-764483309-31CD51378810-00648-02TS INTERCHANGEABLE
Valve,gate
Velan Valve Corp.
4820-01-289-17338538-0-63 INTERCHANGEABLE
Disk,valve
Velan Valve Corp.
4820-01-701-811883309-31-10IN INTERCHANGEABLE
Valve,gate
Velan Valve Corp.
Cross-Reference Index
Part NumberManufacturer
83309-31 Velan Valve Corp. (USA)
83309-31 ITEM 7 12IN. VALVE Velan Valve Corp. (USA)
8558-0-63 PRIMARY Velan Valve Corp. (USA)
Related Parts
5365-00-592-0267INTERCHANGEABLE
BUSHING,NONMETALLIC
13480
4820-01-143-5741INTERCHANGEABLE
STEM,FLUID VALVE
8553-001-065
4820-01-273-7644INTERCHANGEABLE
VALVE,GATE
83309-31CD51378810-00648-02TS
4820-01-289-1733INTERCHANGEABLE
DISK,VALVE
8538-0-63
4820-01-701-8118INTERCHANGEABLE
VALVE,GATE
83309-31-10IN

Frequently Asked Questions

What is NSN 4820-01-289-8351?

NSN 4820-01-289-8351 is a Stem,fluid Valve, manufactured by Velan Valve Corp., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-289-8351?

NSN 4820-01-289-8351 has 3 cross-referenced part numbers: 83309-31 (Velan Valve Corp.), 83309-31 ITEM 7 12IN. VALVE (Velan Valve Corp.), 8558-0-63 (Velan Valve Corp.).

What NSN replaces 4820-01-289-8351?

There are 5 known substitutes for 4820-01-289-8351: 5365-00-592-0267, 4820-01-143-5741, 4820-01-273-7644 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8558-0-63?

Key specifications for 8558-0-63: Valve Type for Which Designed: GATE; Overall Length: 38.000 INCHES NOMINAL IN; Largest Outside Diameter: 2.188 INCHES NOMINAL IN; Valve Size for Which Designed: 12.000 INCHES IN. 6 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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