PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A4001Gear Cluster

Simmonds Precision Products Inc · NSN 3020-00-789-5593 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-789-5593 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-789-5593. Primary manufacturer part number: A4001.
Features
  • Gear Cluster — FSC 3020
  • Design Type: SPUR FIRST GEAR
  • Construction: ASSEMBLED
  • Hub Nominal Length: 0.141 INCHES SECOND END IN
  • Hub Style Designator: PLAIN BETWEEN FIRST AND SECOND GEAR
  • Hub Nominal Diameter: 0.123 INCHES BOTH ENDS IN
  • Nominal Outside Diameter: 0.667 INCHES FIRST GEAR IN
  • Material: COPPER ALLOY OVERALL
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Copper Alloy Overall construction
General Description

The Gear Cluster, cataloged under National Stock Number 3020-00-789-5593, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Simmonds Precision Products Inc. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-789-5593
Primary Part NumberA4001
Item NameGear Cluster
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerSimmonds Precision Products Inc
StatusACTIVE
Design TypeSPUR FIRST GEAR
ConstructionASSEMBLED
Hub Nominal Length0.141 INCHES SECOND END IN
Hub Style DesignatorPLAIN BETWEEN FIRST AND SECOND GEAR
Hub Nominal Diameter0.123 INCHES BOTH ENDS IN
Nominal Outside Diameter0.667 INCHES FIRST GEAR IN
MaterialCOPPER ALLOY OVERALL
Hub Style Designator1 STEP FIRST END
Hub Nominal Length0.141 INCHES FIRST END IN
Hub Nominal Diameter0.123 INCHES BETWEEN FIRST AND SECOND GEAR IN
Nominal Outside Diameter0.1719 INCHES SECOND GEAR IN
Nominal Overall Length0.562 INCHES IN
Design TypeSPUR SECOND GEAR
Hub Style DesignatorPLAIN SECOND END
Hub Nominal Length0.031 INCHES BETWEEN FIRST AND SECOND GEAR IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5935-00-170-81398169230 INTERCHANGEABLE
Connector,plug,electrical
Us Army Aviation and Missile Command
5315-00-488-4397A4001 INTERCHANGEABLE
Pin,hollow
Cessna Aircraft Co Mccauley Accessory Div
2541-01-534-463512526132 INTERCHANGEABLE
Armor,transparent,vehicular Wind
U S Army Tank Automotive Command Amsta-Im-Mm
5945-01-601-4944 INTERCHANGEABLE
Flasher,thermal
Cross-Reference Index
Part NumberManufacturer
A4001 PRIMARY Simmonds Precision Products Inc (USA)
Related Parts
5935-00-170-8139INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
8169230
5315-00-488-4397INTERCHANGEABLE
PIN,HOLLOW
A4001
2541-01-534-4635INTERCHANGEABLE
ARMOR,TRANSPARENT,VEHICULAR WIND
12526132
5945-01-601-4944INTERCHANGEABLE
FLASHER,THERMAL

Frequently Asked Questions

What is NSN 3020-00-789-5593?

NSN 3020-00-789-5593 is a Gear Cluster, manufactured by Simmonds Precision Products Inc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-789-5593?

NSN 3020-00-789-5593 has 1 cross-referenced part number: A4001 (Simmonds Precision Products Inc).

What NSN replaces 3020-00-789-5593?

There are 4 known substitutes for 3020-00-789-5593: 5935-00-170-8139, 5315-00-488-4397, 2541-01-534-4635 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A4001?

Key specifications for A4001: Design Type: SPUR FIRST GEAR; Construction: ASSEMBLED; Hub Nominal Length: 0.141 INCHES SECOND END IN; Hub Style Designator: PLAIN BETWEEN FIRST AND SECOND GEAR. 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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