PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31109Gear,spur

Belfort Instrument Company · NSN 3020-01-413-8923 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-01-413-8923 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-413-8923. Primary manufacturer part number: 31109.
Features
  • Gear,spur — FSC 3020
  • Material: COPPER ALLOY OVERALL
  • Pressure Angle: 20.0000 DEGREES
  • Bore Nominal Diameter: 0.125 INCHES BOTH ENDS IN
  • Nominal Outside Diameter: 0.651 INCHES IN
  • Nominal Distance Between Body Face and Protruding Hub End: 0.202 INCHES FIRST END IN
  • Style Designator: PROTRUDING HUB
  • Hub Nominal Diameter: 0.375 INCHES FIRST END IN
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 3020-01-413-8923, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Belfort Instrument Company. Government technical data includes 13 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-01-413-8923
Primary Part Number31109
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerBelfort Instrument Company
StatusACTIVE
MaterialCOPPER ALLOY OVERALL
Pressure Angle20.0000 DEGREES
Bore Nominal Diameter0.125 INCHES BOTH ENDS IN
Nominal Outside Diameter0.651 INCHES IN
Nominal Distance Between Body Face and Protruding Hub End0.202 INCHES FIRST END IN
Style DesignatorPROTRUDING HUB
Hub Nominal Diameter0.375 INCHES FIRST END IN
Pitch Diameter0.6220 INCHES NOMINAL IN
Teeth Quantity40
Body StylePLAIN, SOLID
Bore StylePLAIN BOTH ENDS
Face Nominal Width0.188 INCHES IN
Hub Style DesignatorPINNED FIRST END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5136-00-239-2775401102 INTERCHANGEABLE
Die,thread Cutting
Greenfield Industries Inc
4730-00-277-8643SAE J512 4-4 040202B INTERCHANGEABLE
Elbow,pipe to Tube
Sae International Dba Sae International
5360-00-314-719523239 INTERCHANGEABLE
Spring,helical,compression
Leslie Controls, Inc. Dba Leslie Controls Inc
5330-00-316-4205 INTERCHANGEABLE
Gasket
6685-01-010-024331109 INTERCHANGEABLE
Tester,pyrometer and Thermocoupl
Thermo Electric Company Inc. Dba Thermo Electric Company
4130-01-235-909631109 INTERCHANGEABLE
Filter Element,air Conditioning
Regal-Beloit Corporation Dba Fasco Group Div Cassville Division
4130-01-425-217231109 INTERCHANGEABLE
Filter Element,air Conditioning
Nidec-Torin Corp
2590-01-431-132131109 INTERCHANGEABLE
Cap,filler Opening
Gates Corporation
5315-01-433-331131109 INTERCHANGEABLE
Pin,straight,headless
Woodward, Inc.
4320-01-443-3093 INTERCHANGEABLE
Impeller,pump,centrifugal
Cross-Reference Index
Part NumberManufacturer
31109 PRIMARY Belfort Instrument Company (USA)
Related Parts
5136-00-239-2775INTERCHANGEABLE
DIE,THREAD CUTTING
401102
4730-00-277-8643INTERCHANGEABLE
ELBOW,PIPE TO TUBE
SAE J512 4-4 040202B
5360-00-314-7195INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
23239
5330-00-316-4205INTERCHANGEABLE
GASKET
6685-01-010-0243INTERCHANGEABLE
TESTER,PYROMETER AND THERMOCOUPL
31109
4130-01-235-9096INTERCHANGEABLE
FILTER ELEMENT,AIR CONDITIONING
31109
4130-01-425-2172INTERCHANGEABLE
FILTER ELEMENT,AIR CONDITIONING
31109
2590-01-431-1321INTERCHANGEABLE
CAP,FILLER OPENING
31109
5315-01-433-3311INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
31109
4320-01-443-3093INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
5999-01-632-0884INTERCHANGEABLE
CONTACT,ELECTRICAL
AT62-201-16141

Frequently Asked Questions

What is NSN 3020-01-413-8923?

NSN 3020-01-413-8923 is a Gear,spur, manufactured by Belfort Instrument Company, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-01-413-8923?

NSN 3020-01-413-8923 has 1 cross-referenced part number: 31109 (Belfort Instrument Company).

What NSN replaces 3020-01-413-8923?

There are 11 known substitutes for 3020-01-413-8923: 5136-00-239-2775, 4730-00-277-8643, 5360-00-314-7195 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31109?

Key specifications for 31109: Material: COPPER ALLOY OVERALL; Pressure Angle: 20.0000 DEGREES; Bore Nominal Diameter: 0.125 INCHES BOTH ENDS IN; Nominal Outside Diameter: 0.651 INCHES IN. 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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