PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

120959Gear,spur

Eaton Aerospace, Llc Dba Jackson South · NSN 3020-00-204-2429 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-204-2429 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-204-2429. Primary manufacturer part number: 120959.
Features
  • Gear,spur — FSC 3020
  • Spline Quantity: 6 BOTH ENDS
  • Pressure Angle: 20.0000 DEGREES
  • Body Style: PLAIN, SOLID
  • End Nominal Length: 0.063 INCHES FIRST END IN
  • Material: STEEL OVERALL
  • Pitch Diameter: 3.3330 INCHES NOMINAL IN
  • Material Document and Classification: MIL-S-890,ALLOY NO 2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
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 3020-00-204-2429, 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 Jackson South. Government technical data includes 12 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-204-2429
Primary Part Number120959
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerEaton Aerospace, Llc Dba Jackson South
StatusACTIVE
Spline Quantity6 BOTH ENDS
Pressure Angle20.0000 DEGREES
Body StylePLAIN, SOLID
End Nominal Length0.063 INCHES FIRST END IN
MaterialSTEEL OVERALL
Pitch Diameter3.3330 INCHES NOMINAL IN
Material Document and ClassificationMIL-S-890,ALLOY NO 2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Tooth FormSTANDARD
Teeth Quantity20
Hardness Rating34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
Bore StyleSTRAIGHT SPLINE BOTH ENDS
Style DesignatorPROTRUDING HUB
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5136-00-203-6647 INTERCHANGEABLE
Tap,thread Cutting
3010-01-215-1620120959 INTERCHANGEABLE
Gridmember,coupling
Rexnord Industries, Llc Div Couplings Division
Cross-Reference Index
Part NumberManufacturer
120959 PRIMARY Eaton Aerospace, Llc Dba Jackson South (USA)
Related Parts
5136-00-203-6647INTERCHANGEABLE
TAP,THREAD CUTTING
3010-01-215-1620INTERCHANGEABLE
GRIDMEMBER,COUPLING
120959

Frequently Asked Questions

What is NSN 3020-00-204-2429?

NSN 3020-00-204-2429 is a Gear,spur, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-204-2429?

NSN 3020-00-204-2429 has 1 cross-referenced part number: 120959 (Eaton Aerospace, Llc Dba Jackson South).

What NSN replaces 3020-00-204-2429?

There are 2 known substitutes for 3020-00-204-2429: 5136-00-203-6647, 3010-01-215-1620. Verify interchangeability with system specifications before substitution.

What are the specifications of 120959?

Key specifications for 120959: Spline Quantity: 6 BOTH ENDS; Pressure Angle: 20.0000 DEGREES; Body Style: PLAIN, SOLID; End Nominal Length: 0.063 INCHES FIRST END IN. 12 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com