PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

255-40Gear,spur

Southern Gear & Machine Inc · NSN 3020-01-106-1823 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-01-106-1823 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-106-1823. Primary manufacturer part number: 255-40.
Features
  • Gear,spur — FSC 3020
  • Pressure Angle: 20.0000 DEGREES
  • Bore Nominal Diameter: 0.188 INCHES BOTH ENDS IN
  • Bore Style: PLAIN BOTH ENDS
  • Nominal Outside Diameter: 0.656 INCHES IN
  • Material: ALUMINUM ALLOY 2024 OVERALL
  • Body Style: PLAIN, SOLID
  • Hub Style Designator: PINNED FIRST END
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Aluminum Alloy 2024 Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-01-106-1823, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Southern Gear & Machine Inc. Government technical data includes 15 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-01-106-1823
Primary Part Number255-40
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerSouthern Gear & Machine Inc
StatusACTIVE
Pressure Angle20.0000 DEGREES
Bore Nominal Diameter0.188 INCHES BOTH ENDS IN
Bore StylePLAIN BOTH ENDS
Nominal Outside Diameter0.656 INCHES IN
MaterialALUMINUM ALLOY 2024 OVERALL
Body StylePLAIN, SOLID
Hub Style DesignatorPINNED FIRST END
Hub Nominal Diameter0.375 INCHES FIRST END IN
Nominal Distance Between Body Face and Protruding Hub End0.250 INCHES FIRST END IN
Pitch Diameter0.6250 INCHES NOMINAL IN
Teeth Quantity40
Material Document and ClassificationQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Tooth FormSTANDARD
Style DesignatorPROTRUDING HUB
Face Nominal Width0.125 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5930-00-974-7038 INTERCHANGEABLE
Switch,electrical
3120-01-037-878025540 INTERCHANGEABLE
Bearing
Jetstream of Houston, Llp Dba Jetstream of Houston Llp
2520-01-301-534125540 INTERCHANGEABLE
Plate,intermediate,friction Clut
Paccar Winch Inc Dba Paccar Winch Division
5999-01-343-9100PLT2S-M69 INTERCHANGEABLE
Clamp,electrical
Panduit Corp.
4030-01-518-334825540-1 INTERCHANGEABLE
Thimble,rope
United States Department of the Navy Dba Naval Surface Warfare Center Panama City
6540-01-597-62964-0135-9100 INTERCHANGEABLE
Carrier,prescription Insert
Revision Military Limited
Cross-Reference Index
Part NumberManufacturer
255-40 PRIMARY Southern Gear & Machine Inc (USA)
Related Parts
5930-00-974-7038INTERCHANGEABLE
SWITCH,ELECTRICAL
3120-01-037-8780INTERCHANGEABLE
BEARING
25540
2520-01-301-5341INTERCHANGEABLE
PLATE,INTERMEDIATE,FRICTION CLUT
25540
5999-01-343-9100INTERCHANGEABLE
CLAMP,ELECTRICAL
PLT2S-M69
4030-01-518-3348INTERCHANGEABLE
THIMBLE,ROPE
25540-1
6540-01-597-6296INTERCHANGEABLE
CARRIER,PRESCRIPTION INSERT
4-0135-9100

Frequently Asked Questions

What is NSN 3020-01-106-1823?

NSN 3020-01-106-1823 is a Gear,spur, manufactured by Southern Gear & Machine Inc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-01-106-1823?

NSN 3020-01-106-1823 has 1 cross-referenced part number: 255-40 (Southern Gear & Machine Inc).

What NSN replaces 3020-01-106-1823?

There are 6 known substitutes for 3020-01-106-1823: 5930-00-974-7038, 3120-01-037-8780, 2520-01-301-5341 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 255-40?

Key specifications for 255-40: Pressure Angle: 20.0000 DEGREES; Bore Nominal Diameter: 0.188 INCHES BOTH ENDS IN; Bore Style: PLAIN BOTH ENDS; Nominal Outside Diameter: 0.656 INCHES IN. 15 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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