PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

321ATester,hydraulic Hose Assembly

Avitest Llc · NSN 4940-01-064-5057 · FSC 4940 · No Item Name Available
Verified by PartsTable
NSN 4940-01-064-5057 — this item is cataloged by the U.S. Government under National Stock Number 4940-01-064-5057. Primary manufacturer part number: 321A.
Features
  • Tester,hydraulic Hose Assembly — FSC 4940
  • General Characteristics Item Description: 5 1/2 GAL.RESERVOIR,FLUID MIL-H-5606 OR MIL-H-82382,10 MICRON FILTRATION,160 PSIG AIR (MAX),21 LOOSE ADAPTERS 16 THROUGH 36
  • 2 verified cross-references
  • Primary manufacturer: Avitest Llc
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Tester,hydraulic Hose Assembly, cataloged under National Stock Number 4940-01-064-5057, is classified within Federal Supply Class 4940 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Avitest Llc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, 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
NSN4940-01-064-5057
Primary Part Number321A
Item NameTester,hydraulic Hose Assembly
FSC / FSG4940 / 49 — No Item Name Available
ManufacturerAvitest Llc
StatusACTIVE
General Characteristics Item Description5 1/2 GAL.RESERVOIR,FLUID MIL-H-5606 OR MIL-H-82382,10 MICRON FILTRATION,160 PSIG AIR (MAX),21 LOOSE ADAPTERS 16 THROUGH 36
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6720-00-069-5351321A INTERCHANGEABLE
Camera,still Picture
Bae Systems Information and Electronic Systems Integration Inc.
5342-00-200-41148177310 INTERCHANGEABLE
Mount,resilient,weapon System
Us Army Aviation and Missile Command
6240-00-271-5991321A INTERCHANGEABLE
Lamp,incandescent
General Electric Company
4820-00-469-66153712M2Y INTERCHANGEABLE
Valve,globe
Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
6625-00-852-0179321A INTERCHANGEABLE
Oscilloscope
Tektronix, Inc.
6625-01-048-4112321A INTERCHANGEABLE
Voltmeter
North Atlantic Industries, Inc. Dba North Atlantic Industries
4930-01-532-5226 INTERCHANGEABLE
Vent Unit,relief
Cross-Reference Index
Part NumberManufacturer
321A PRIMARY Avitest Llc (USA)
321A Aviation Technology, Inc. (USA)
Related Parts
6720-00-069-5351INTERCHANGEABLE
CAMERA,STILL PICTURE
321A
5342-00-200-4114INTERCHANGEABLE
MOUNT,RESILIENT,WEAPON SYSTEM
8177310
6240-00-271-5991INTERCHANGEABLE
LAMP,INCANDESCENT
321A
4820-00-469-6615INTERCHANGEABLE
VALVE,GLOBE
3712M2Y
6625-00-852-0179INTERCHANGEABLE
OSCILLOSCOPE
321A
6625-01-048-4112INTERCHANGEABLE
VOLTMETER
321A
4930-01-532-5226INTERCHANGEABLE
VENT UNIT,RELIEF

Frequently Asked Questions

What is NSN 4940-01-064-5057?

NSN 4940-01-064-5057 is a Tester,hydraulic Hose Assembly, manufactured by Avitest Llc, classified under FSC 4940 (No Item Name Available). Status: active.

What are the part numbers for NSN 4940-01-064-5057?

NSN 4940-01-064-5057 has 2 cross-referenced part numbers: 321A (Avitest Llc), 321A (Aviation Technology, Inc.).

What NSN replaces 4940-01-064-5057?

There are 7 known substitutes for 4940-01-064-5057: 6720-00-069-5351, 5342-00-200-4114, 6240-00-271-5991 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 321A?

Key specifications for 321A: General Characteristics Item Description: 5 1/2 GAL.RESERVOIR,FLUID MIL-H-5606 OR MIL-H-82382,10 MICRON FILTRATION,160 PSIG AIR (MAX),21 LOOSE ADAPTERS 16 THROUGH 36. 1 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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