PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A31111Gear,spur

Simmonds Precision Products Inc · NSN 3020-00-873-5713 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-873-5713 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-873-5713. Primary manufacturer part number: A31111.
Features
  • Gear,spur — FSC 3020
  • Nominal Outside Diameter: 0.876 INCHES IN
  • Pressure Angle: 20.0000 DEGREES
  • Bore Nominal Diameter: 0.126 INCHES BOTH ENDS IN
  • Tooth Form: STANDARD
  • Keyway Nominal Width: 0.064 INCHES BOTH ENDS IN
  • Nominal Overall Length: 0.200 INCHES IN
  • Hub Nominal Diameter: 0.310 INCHES FIRST END IN
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Copper Alloy 642 Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-00-873-5713, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Simmonds Precision Products Inc. Government technical data includes 18 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
NSN3020-00-873-5713
Primary Part NumberA31111
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerSimmonds Precision Products Inc
StatusACTIVE
Nominal Outside Diameter0.876 INCHES IN
Pressure Angle20.0000 DEGREES
Bore Nominal Diameter0.126 INCHES BOTH ENDS IN
Tooth FormSTANDARD
Keyway Nominal Width0.064 INCHES BOTH ENDS IN
Nominal Overall Length0.200 INCHES IN
Hub Nominal Diameter0.310 INCHES FIRST END IN
MaterialCOPPER ALLOY 642 OVERALL
Nominal Distance Between Body Face and Protruding Hub End0.100 INCHES FIRST END IN
Pitch Diameter0.8440 INCHES MINIMUM AND 0.8450 INCHES MAXIMUM IN
Material Document and ClassificationAMS 4631 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Bore StyleW/ KEYWAY BOTH ENDS
Face Nominal Width0.100 INCHES IN
Style DesignatorPROTRUDING HUB
Nominal Distance From Bore Center to Keyway Bottom0.126 INCHES BOTH ENDS IN
Teeth Quantity55
Hub Style DesignatorPLAIN FIRST END
Body StylePLAIN, SOLID
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
3020-01-251-5896A3111-1 INTERCHANGEABLE
Gear,spur
Eaton Aerospace Llc Sterer Engineering Morgan Actuators
Cross-Reference Index
Part NumberManufacturer
A31111 PRIMARY Simmonds Precision Products Inc (USA)
Related Parts
3020-01-251-5896INTERCHANGEABLE
GEAR,SPUR
A3111-1

Frequently Asked Questions

What is NSN 3020-00-873-5713?

NSN 3020-00-873-5713 is a Gear,spur, manufactured by Simmonds Precision Products Inc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-873-5713?

NSN 3020-00-873-5713 has 1 cross-referenced part number: A31111 (Simmonds Precision Products Inc).

What NSN replaces 3020-00-873-5713?

There is 1 known substitute for 3020-00-873-5713: 3020-01-251-5896. Verify interchangeability with system specifications before substitution.

What are the specifications of A31111?

Key specifications for A31111: Nominal Outside Diameter: 0.876 INCHES IN; Pressure Angle: 20.0000 DEGREES; Bore Nominal Diameter: 0.126 INCHES BOTH ENDS IN; Tooth Form: STANDARD. 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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