PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

154-21Gear,spur

Southern Gear & Machine Inc · NSN 3020-00-460-3269 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-460-3269 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-460-3269. Primary manufacturer part number: 154-21.
Features
  • Gear,spur — FSC 3020
  • Nominal Overall Length: 0.375 INCHES IN
  • Mounting Hole Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END
  • Material Document and Classification: QQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Mounting Hole Thread Quantity Per Inch: 32 TRANSVERSELY THROUGH HUB FIRST END
  • Attachment Method: MOUNTING HOLE
  • Hub Style Designator: PLAIN FIRST END
  • Pitch Diameter: 0.4365 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Steel Comp 303 Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-00-460-3269, 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 22 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
NSN3020-00-460-3269
Primary Part Number154-21
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerSouthern Gear & Machine Inc
StatusACTIVE
Nominal Overall Length0.375 INCHES IN
Mounting Hole Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END
Material Document and ClassificationQQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Mounting Hole Thread Quantity Per Inch32 TRANSVERSELY THROUGH HUB FIRST END
Attachment MethodMOUNTING HOLE
Hub Style DesignatorPLAIN FIRST END
Pitch Diameter0.4365 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN
Mounting Hole Type and Quantity1 THREADED TRANSVERSELY THROUGH HUB FIRST END
Mounting Hole Nominal Thread Size0.138 INCHES TRANSVERSELY THROUGH HUB FIRST END IN
Surface TreatmentPASSIVATE OVERALL
MaterialSTEEL COMP 303 OVERALL
Nominal Distance Between Body Face and Protruding Hub End0.250 INCHES FIRST END IN
Style DesignatorPROTRUDING HUB
Bore Nominal Diameter0.250 INCHES BOTH ENDS IN
Nominal Outside Diameter0.477 INCHES IN
Body StylePLAIN, SOLID
Hub Nominal Diameter0.406 INCHES FIRST END IN
Pressure Angle20.0000 DEGREES
Bore StylePLAIN BOTH ENDS
Tooth FormSTANDARD
Face Nominal Width0.125 INCHES IN
Teeth Quantity21
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3455-00-224-373210305 INTERCHANGEABLE
Cutter,milling,end
Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039
2805-00-371-637615-421 INTERCHANGEABLE
Valve,poppet,engine
Dresser Industries Inc Leroi Div
6680-00-526-9023G656-3 INTERCHANGEABLE
Indicator,sight,liquid
Ldi Industries, Inc. Dba Ldi Industries Inc
5136-00-604-641115421 INTERCHANGEABLE
Die Head,hand
Curtis-Toledo, Inc.
5950-01-414-693015421 INTERCHANGEABLE
Coil,radio Frequency
Viavi Solutionsllc
2090-01-571-2239 INTERCHANGEABLE
Thl Chair Back
Cross-Reference Index
Part NumberManufacturer
154-21 PRIMARY Southern Gear & Machine Inc (USA)
Related Parts
3455-00-224-3732INTERCHANGEABLE
CUTTER,MILLING,END
10305
2805-00-371-6376INTERCHANGEABLE
VALVE,POPPET,ENGINE
15-421
6680-00-526-9023INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
G656-3
5136-00-604-6411INTERCHANGEABLE
DIE HEAD,HAND
15421
5950-01-414-6930INTERCHANGEABLE
COIL,RADIO FREQUENCY
15421
2090-01-571-2239INTERCHANGEABLE
THL CHAIR BACK

Frequently Asked Questions

What is NSN 3020-00-460-3269?

NSN 3020-00-460-3269 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 3020-00-460-3269?

NSN 3020-00-460-3269 has 1 cross-referenced part number: 154-21 (Southern Gear & Machine Inc).

What NSN replaces 3020-00-460-3269?

There are 6 known substitutes for 3020-00-460-3269: 3455-00-224-3732, 2805-00-371-6376, 6680-00-526-9023 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 154-21?

Key specifications for 154-21: Nominal Overall Length: 0.375 INCHES IN; Mounting Hole Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END; Material Document and Classification: QQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Mounting Hole Thread Quantity Per Inch: 32 TRANSVERSELY THROUGH HUB FIRST END. 22 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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