PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A8977Gear Cluster

Am General Llc · NSN 3020-00-360-8150 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-360-8150 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-360-8150. Primary manufacturer part number: A8977.
Features
  • Gear Cluster — FSC 3020
  • Construction: SOLID
  • Nominal Overall Length: 5.488 INCHES IN
  • Hub Nominal Diameter: 0.775 INCHES BETWEEN FIRST AND SECOND GEAR IN
  • Design Type: HELICAL SECOND GEAR
  • Design Type: SPUR FOURTH GEAR
  • Material Document and Classification: 66,AISI/SAE 8720 FED STD SINGLE MATERIAL RESPONSE OR SAE 4027 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 4161 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Hub Nominal Length: 0.203 INCHES BETWEEN SECOND AND THIRD GEAR IN
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Steel Comp 4027 or Steel Comp 8620 or Steel Comp 8720 or Steel Comp 4161 Overall construction
General Description

The Gear Cluster, cataloged under National Stock Number 3020-00-360-8150, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Am General Llc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-360-8150
Primary Part NumberA8977
Item NameGear Cluster
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerAm General Llc
StatusACTIVE
ConstructionSOLID
Nominal Overall Length5.488 INCHES IN
Hub Nominal Diameter0.775 INCHES BETWEEN FIRST AND SECOND GEAR IN
Design TypeHELICAL SECOND GEAR
Design TypeSPUR FOURTH GEAR
Material Document and Classification66,AISI/SAE 8720 FED STD SINGLE MATERIAL RESPONSE OR SAE 4027 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 4161 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Hub Nominal Length0.203 INCHES BETWEEN SECOND AND THIRD GEAR IN
Hub Nominal Length0.812 INCHES BETWEEN THIRD AND FOURTH GEAR IN
Bore Nominal Diameter0.762 INCHES BOTH ENDS IN
Nominal Outside Diameter3.385 INCHES FOURTH GEAR IN
Nominal Outside Diameter2.813 INCHES FIFTH GEAR IN
Hub Nominal Diameter1.094 INCHES BETWEEN THIRD AND FOURTH GEAR IN
Hub Nominal Length1.875 INCHES BETWEEN FIRST AND SECOND GEAR IN
Design TypeHELICAL FIRST GEAR
Bore StylePLAIN BOTH ENDS
MaterialSTEEL COMP 4027 OR STEEL COMP 8620 OR STEEL COMP 8720 OR STEEL COMP 4161 OVERALL
Nominal Outside Diameter2.165 INCHES SIXTH GEAR IN
Design TypeHELICAL THIRD GEAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
3020-00-360-8127A739 INTERCHANGEABLE
Gear,transmission
Am General Llc
4320-01-208-2186A739 INTERCHANGEABLE
Impeller,pump,centrifugal
Circor Naval Solutions Llc Dba Warren Pumps
Cross-Reference Index
Part NumberManufacturer
A739 Spalla Inc (USA)
GPW7113 Ford Motor Co Ford Parts and Service Div Government Part Sales (USA)
7348696 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
A8977 PRIMARY Am General Llc (USA)
T84J8 PRIMARY Borg-Warner Corp (USA)
T84J8 Liberty Ventures Inti, Llc (USA)
Related Parts
3020-00-360-8127INTERCHANGEABLE
GEAR,TRANSMISSION
A739
4320-01-208-2186INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
A739

Frequently Asked Questions

What is NSN 3020-00-360-8150?

NSN 3020-00-360-8150 is a Gear Cluster, manufactured by Am General Llc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-360-8150?

NSN 3020-00-360-8150 has 6 cross-referenced part numbers: A739 (Spalla Inc), GPW7113 (Ford Motor Co Ford Parts and Service Div Government Part Sales), 7348696 (U S Army Tank Automotive Command Amsta-Im-Mm), A8977 (Am General Llc), T84J8 (Borg-Warner Corp) and 1 more.

What NSN replaces 3020-00-360-8150?

There are 2 known substitutes for 3020-00-360-8150: 3020-00-360-8127, 4320-01-208-2186. Verify interchangeability with system specifications before substitution.

What are the specifications of A8977?

Key specifications for A8977: Construction: SOLID; Nominal Overall Length: 5.488 INCHES IN; Hub Nominal Diameter: 0.775 INCHES BETWEEN FIRST AND SECOND GEAR IN; Design Type: HELICAL SECOND GEAR. 18 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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