PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21000-100Valve,check

Hydraulics International, Inc. Dba Hydraulics International Inc · NSN 4820-01-389-4191 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-389-4191 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-389-4191. Primary manufacturer part number: 21000-100.
Features
  • Valve,check — FSC 4820
  • 1 verified cross-reference
  • Primary manufacturer: Hydraulics International, Inc. Dba Hydraulics International Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,check, cataloged under National Stock Number 4820-01-389-4191, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hydraulics International, Inc. Dba Hydraulics International Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameValve,check
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersHydraulics International, Inc. Dba Hydraulics International Inc (CAGE 56529)
Technical Specifications
ParameterValue
NSN4820-01-389-4191
Primary Part Number21000-100
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHydraulics International, Inc. Dba Hydraulics International Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5960-00-158-4841B5441A INTERCHANGEABLE
Electron Tube
Unisys Corporation Dba Unisys Corp
5905-00-715-63692100-0100 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Keysight Technologies Inc
Cross-Reference Index
Part NumberManufacturer
21000-100 PRIMARY Hydraulics International, Inc. Dba Hydraulics International Inc (USA)
Related Parts
5960-00-158-4841INTERCHANGEABLE
ELECTRON TUBE
B5441A
5905-00-715-6369INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
2100-0100

Frequently Asked Questions

What is NSN 4820-01-389-4191?

NSN 4820-01-389-4191 is a Valve,check, manufactured by Hydraulics International, Inc. Dba Hydraulics International Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-389-4191?

NSN 4820-01-389-4191 has 1 cross-referenced part number: 21000-100 (Hydraulics International, Inc. Dba Hydraulics International Inc).

What NSN replaces 4820-01-389-4191?

There are 2 known substitutes for 4820-01-389-4191: 5960-00-158-4841, 5905-00-715-6369. Verify interchangeability with system specifications before substitution.

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