PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A6649Gear,spur

Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division · NSN 3020-00-757-8377 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-757-8377 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-757-8377. Primary manufacturer part number: A6649.
Features
  • Gear,spur — FSC 3020
  • Body Style: PLAIN, SOLID
  • Pitch Diameter: 0.5830 INCHES NOMINAL IN
  • Surface Treatment: PHOSPHATE OVERALL
  • Pressure Angle: 20.0000 DEGREES
  • Teeth Quantity: 28
  • Material: STEEL OVERALL
  • Style Designator: HUBLESS
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Steel Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-00-757-8377, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division. Government technical data includes 13 verified specifications, 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-757-8377
Primary Part NumberA6649
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerEaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division
StatusACTIVE
Body StylePLAIN, SOLID
Pitch Diameter0.5830 INCHES NOMINAL IN
Surface TreatmentPHOSPHATE OVERALL
Pressure Angle20.0000 DEGREES
Teeth Quantity28
MaterialSTEEL OVERALL
Style DesignatorHUBLESS
Nominal Outside Diameter0.634 INCHES IN
Bore Nominal Diameter0.343 INCHES BOTH ENDS IN
Face Nominal Width0.250 INCHES IN
Tooth FormSTANDARD
Hardness Rating35.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM OVERALL
Bore StylePLAIN BOTH ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5950-00-254-3991SC-D-93387 INTERCHANGEABLE
Transformer,audio Frequency
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
Cross-Reference Index
Part NumberManufacturer
A6649 Eaton Motor Site (USA)
A6649 PRIMARY Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division (USA)
Related Parts
5950-00-254-3991INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
SC-D-93387

Frequently Asked Questions

What is NSN 3020-00-757-8377?

NSN 3020-00-757-8377 is a Gear,spur, manufactured by Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-757-8377?

NSN 3020-00-757-8377 has 2 cross-referenced part numbers: A6649 (Eaton Motor Site), A6649 (Eaton Aerospace Llc Dba Eaton Inoac Div Fuel & Motion Control Systems Division).

What NSN replaces 3020-00-757-8377?

There is 1 known substitute for 3020-00-757-8377: 5950-00-254-3991. Verify interchangeability with system specifications before substitution.

What are the specifications of A6649?

Key specifications for A6649: Body Style: PLAIN, SOLID; Pitch Diameter: 0.5830 INCHES NOMINAL IN; Surface Treatment: PHOSPHATE OVERALL; Pressure Angle: 20.0000 DEGREES. 13 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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