PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8401ATest Set,indicator

Hydraulic Technology, Inc · NSN 4920-01-234-9089 · FSC 4920 · No Item Name Available
Verified by PartsTable
NSN 4920-01-234-9089 — this item is cataloged by the U.S. Government under National Stock Number 4920-01-234-9089. Primary manufacturer part number: 8401A.
Features
  • Test Set,indicator — FSC 4920
  • Material: ALUMINUM CARRYING CASE
  • Frequency Rating: 60.0 HERTZ MINIMUM AND 100.0 HERTZ MAXIMUM LOCATION NOT OTHERWISE SPECIFIED
  • Width: 10.000 INCHES NOMINAL IN
  • Entry Date: 03-08-13
  • Reference Data and Literature: TO 33D2-6-242-1
  • Functional Classification: AA-9.3
  • Electrical Power Source Relationship: OPERATING
Applications
  • Applications requiring Aluminum Carrying Case construction
General Description

The Test Set,indicator, cataloged under National Stock Number 4920-01-234-9089, is classified within Federal Supply Class 4920 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Hydraulic Technology, Inc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4920-01-234-9089
Primary Part Number8401A
Item NameTest Set,indicator
FSC / FSG4920 / 49 — No Item Name Available
ManufacturerHydraulic Technology, Inc
StatusACTIVE
MaterialALUMINUM CARRYING CASE
Frequency Rating60.0 HERTZ MINIMUM AND 100.0 HERTZ MAXIMUM LOCATION NOT OTHERWISE SPECIFIED
Width10.000 INCHES NOMINAL IN
Entry Date03-08-13
Reference Data and LiteratureTO 33D2-6-242-1
Functional ClassificationAA-9.3
Electrical Power Source RelationshipOPERATING
Depth12.000 INCHES NOMINAL IN
Major ComponentsCABLES 8401-1 THRU -8
AC Voltage Rating115.0 VOLTS NOMINAL LOCATION NOT OTHERWISE SPECIFIED
Enclosure FeatureSINGLE ITEM W/CARRYING CASE
Length21.000 INCHES NOMINAL IN
Specification/standard Data81349-MIL-T-26219A GOVERNMENT SPECIFICATION A
Functional DescriptionUSED TO TEST AIRCRAFT TACHOMETER GENERATORS AND INDICATORS ON PISTON AND JET ENGINE AIRCRAFT BOTH ON AND OFF THE AIRCRAFT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5935-00-027-95471825 INTERCHANGEABLE
Plug,tip
Fluke Electronics Corp
5985-00-087-19348401 INTERCHANGEABLE
Cushion
Armed Forces Equip Development Co C/o Falling Creek Metal Products
3030-00-264-306030275A INTERCHANGEABLE
Belt,v
Brinkley Technology Group Llc Dba Hercules Manufacturing
6145-00-548-09398401 INTERCHANGEABLE
Cable,special Purpose,electrical
Belden Wire and Cable Co Wire and Cable Office
5985-01-032-43718401 INTERCHANGEABLE
Dummy Load,electrical
Bird Electronic Corporation Div Bird Electronic Corp
4820-01-281-74258401 INTERCHANGEABLE
Seat Assembly,valve
Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect
5365-01-284-7807840100 INTERCHANGEABLE
Ring
Alfa Laval Inc
5805-01-310-7312SWLR-PB-FG2S INTERCHANGEABLE
Telephone Set
Hose-Mccann Telephone Co, Inc
5340-01-530-39498401 INTERCHANGEABLE
Standoff,threaded,spacing
Keystone Electronics Corp
5340-01-629-9334840-1 INTERCHANGEABLE
Pad,cushioning
Hd Supply Construction Supply Group, Inc.
Cross-Reference Index
Part NumberManufacturer
8401 Hydraulic Technology, Inc (USA)
MIL-T-26219 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
8401A PRIMARY Hydraulic Technology, Inc (USA)
Related Parts
5935-00-027-9547INTERCHANGEABLE
PLUG,TIP
1825
5985-00-087-1934INTERCHANGEABLE
CUSHION
8401
3030-00-264-3060INTERCHANGEABLE
BELT,V
30275A
6145-00-548-0939INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
8401
5985-01-032-4371INTERCHANGEABLE
DUMMY LOAD,ELECTRICAL
8401
4820-01-281-7425INTERCHANGEABLE
SEAT ASSEMBLY,VALVE
8401
5365-01-284-7807INTERCHANGEABLE
RING
840100
5805-01-310-7312INTERCHANGEABLE
TELEPHONE SET
SWLR-PB-FG2S
5340-01-530-3949INTERCHANGEABLE
STANDOFF,THREADED,SPACING
8401
5340-01-629-9334INTERCHANGEABLE
PAD,CUSHIONING
840-1

Frequently Asked Questions

What is NSN 4920-01-234-9089?

NSN 4920-01-234-9089 is a Test Set,indicator, manufactured by Hydraulic Technology, Inc, classified under FSC 4920 (No Item Name Available). Status: active.

What are the part numbers for NSN 4920-01-234-9089?

NSN 4920-01-234-9089 has 3 cross-referenced part numbers: 8401 (Hydraulic Technology, Inc), MIL-T-26219 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 8401A (Hydraulic Technology, Inc).

What NSN replaces 4920-01-234-9089?

There are 10 known substitutes for 4920-01-234-9089: 5935-00-027-9547, 5985-00-087-1934, 3030-00-264-3060 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8401A?

Key specifications for 8401A: Material: ALUMINUM CARRYING CASE; Frequency Rating: 60.0 HERTZ MINIMUM AND 100.0 HERTZ MAXIMUM LOCATION NOT OTHERWISE SPECIFIED; Width: 10.000 INCHES NOMINAL IN; Entry Date: 03-08-13. 15 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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