PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50324-4Gear,spur

Ambac International Corporation Div Ambac International · NSN 3020-00-528-6840 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-528-6840 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-528-6840. Primary manufacturer part number: 50324-4.
Features
  • Gear,spur — FSC 3020
  • Bore Nominal Diameter: 0.4375 INCHES BOTH ENDS IN
  • Keyway Nominal Width: 0.0938 INCHES BOTH ENDS IN
  • Hub Nominal Diameter: 0.5625 INCHES SECOND END IN
  • Nominal Distance Between Body Face and Protruding Hub End: 0.063 INCHES SECOND END IN
  • Hub Nominal Diameter: 0.6875 INCHES FIRST END IN
  • Nominal Distance Between Body Face and Protruding Hub End: 0.250 INCHES FIRST END IN
  • Body Style: PLAIN, WITH LIGHTENING HOLES
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Copper Alloy Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-00-528-6840, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Ambac International Corporation Div Ambac International. Government technical data includes 19 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-528-6840
Primary Part Number50324-4
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerAmbac International Corporation Div Ambac International
StatusACTIVE
Bore Nominal Diameter0.4375 INCHES BOTH ENDS IN
Keyway Nominal Width0.0938 INCHES BOTH ENDS IN
Hub Nominal Diameter0.5625 INCHES SECOND END IN
Nominal Distance Between Body Face and Protruding Hub End0.063 INCHES SECOND END IN
Hub Nominal Diameter0.6875 INCHES FIRST END IN
Nominal Distance Between Body Face and Protruding Hub End0.250 INCHES FIRST END IN
Body StylePLAIN, WITH LIGHTENING HOLES
Nominal Outside Diameter6.5625 INCHES IN
Pitch Diameter6.5000 INCHES NOMINAL IN
Teeth Quantity208
Tooth FormSTANDARD
Hub Style DesignatorPLAIN BOTH ENDS
MaterialCOPPER ALLOY OVERALL
Material Document and ClassificationMIL-B-16540,GRADE A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Style DesignatorPROTRUDING HUBS
Pressure Angle14.5000 DEGREES
Face Nominal Width0.188 INCHES IN
Nominal Distance From Bore Center to Keyway Bottom0.2702 INCHES BOTH ENDS IN
Bore StyleW/ KEYWAY BOTH ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-00-050-32448785427 INTERCHANGEABLE
Nut,self-Locking,hexagon
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament
Cross-Reference Index
Part NumberManufacturer
50324-4 PRIMARY Ambac International Corporation Div Ambac International (USA)
Related Parts
5310-00-050-3244INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
8785427

Frequently Asked Questions

What is NSN 3020-00-528-6840?

NSN 3020-00-528-6840 is a Gear,spur, manufactured by Ambac International Corporation Div Ambac International, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-528-6840?

NSN 3020-00-528-6840 has 1 cross-referenced part number: 50324-4 (Ambac International Corporation Div Ambac International).

What NSN replaces 3020-00-528-6840?

There is 1 known substitute for 3020-00-528-6840: 5310-00-050-3244. Verify interchangeability with system specifications before substitution.

What are the specifications of 50324-4?

Key specifications for 50324-4: Bore Nominal Diameter: 0.4375 INCHES BOTH ENDS IN; Keyway Nominal Width: 0.0938 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.5625 INCHES SECOND END IN; Nominal Distance Between Body Face and Protruding Hub End: 0.063 INCHES SECOND END IN. 19 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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