PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

154-20Gear,spur

Southern Gear & Machine Inc · NSN 3020-00-725-3849 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-725-3849 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-725-3849. Primary manufacturer part number: 154-20.
Features
  • Gear,spur — FSC 3020
  • Tooth Form: STANDARD
  • Surface Treatment: PASSIVATE OVERALL
  • Body Style: PLAIN, SOLID
  • Pitch Diameter: 0.4166 INCHES NOMINAL IN
  • Face Nominal Width: 0.125 INCHES IN
  • Pressure Angle: 20.0000 DEGREES
  • Nominal Distance Between Body Face and Protruding Hub End: 0.250 INCHES FIRST END IN
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-00-725-3849, 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 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3020-00-725-3849
Primary Part Number154-20
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerSouthern Gear & Machine Inc
StatusCANCELLED
Tooth FormSTANDARD
Surface TreatmentPASSIVATE OVERALL
Body StylePLAIN, SOLID
Pitch Diameter0.4166 INCHES NOMINAL IN
Face Nominal Width0.125 INCHES IN
Pressure Angle20.0000 DEGREES
Nominal Distance Between Body Face and Protruding Hub End0.250 INCHES FIRST END IN
Bore Nominal Diameter0.250 INCHES BOTH ENDS IN
Nominal Outside Diameter0.458 INCHES IN
Bore StylePLAIN BOTH ENDS
Style DesignatorPROTRUDING HUB
MaterialSTEEL CORROSION RESISTING OVERALL
Hub Nominal Diameter0.405 INCHES FIRST END IN
Hub Style DesignatorPLAIN FIRST END
Teeth Quantity20
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
1650-00-073-915215420 INTERCHANGEABLE
Accumulator,hydraulic
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
3455-00-228-529415420 INTERCHANGEABLE
Cutter,milling,end
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
5975-00-281-0021S154-2064 INTERCHANGEABLE
Conduit,metal,flexible
Vse Aviation, Inc.
5120-00-316-5227 INTERCHANGEABLE
Lapping Tool
1650-00-438-390915420 INTERCHANGEABLE
Seat,relief Valve
Hydro-Aire Aerospace Corp
5136-00-604-641015420 INTERCHANGEABLE
Die Head,hand
Curtis-Toledo, Inc.
4820-00-793-293515420 INTERCHANGEABLE
Body,valve
Mission Systems Orchard Park Inc
5961-00-904-51436054-102-2 INTERCHANGEABLE
Transistor
B.c. Systems Inc. Dba Bc Systems Inc
5935-01-155-927915420 INTERCHANGEABLE
Plug,tip
Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect
1660-01-204-9377 INTERCHANGEABLE
Duct Assembly,air Conditioning-H
Cross-Reference Index
Part NumberManufacturer
154-20 PRIMARY Southern Gear & Machine Inc (USA)
44-32609A01 Motorola Inc. Dba Integrated Information Systems Group (USA)
Related Parts
1650-00-073-9152INTERCHANGEABLE
ACCUMULATOR,HYDRAULIC
15420
3455-00-228-5294INTERCHANGEABLE
CUTTER,MILLING,END
15420
5975-00-281-0021INTERCHANGEABLE
CONDUIT,METAL,FLEXIBLE
S154-2064
5120-00-316-5227INTERCHANGEABLE
LAPPING TOOL
1650-00-438-3909INTERCHANGEABLE
SEAT,RELIEF VALVE
15420
5136-00-604-6410INTERCHANGEABLE
DIE HEAD,HAND
15420
4820-00-793-2935INTERCHANGEABLE
BODY,VALVE
15420
5961-00-904-5143INTERCHANGEABLE
TRANSISTOR
6054-102-2
5935-01-155-9279INTERCHANGEABLE
PLUG,TIP
15420
1660-01-204-9377INTERCHANGEABLE
DUCT ASSEMBLY,AIR CONDITIONING-H
3030-01-223-0574INTERCHANGEABLE
BELT,V
15420
6515-01-545-5192INTERCHANGEABLE
AIRWAY SET,ORAL
15420

Frequently Asked Questions

What is NSN 3020-00-725-3849?

NSN 3020-00-725-3849 is a Gear,spur, manufactured by Southern Gear & Machine Inc, classified under FSC 3020 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3020-00-725-3849?

NSN 3020-00-725-3849 has 2 cross-referenced part numbers: 154-20 (Southern Gear & Machine Inc), 44-32609A01 (Motorola Inc. Dba Integrated Information Systems Group).

What NSN replaces 3020-00-725-3849?

There are 12 known substitutes for 3020-00-725-3849: 1650-00-073-9152, 3455-00-228-5294, 5975-00-281-0021 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 154-20?

Key specifications for 154-20: Tooth Form: STANDARD; Surface Treatment: PASSIVATE OVERALL; Special Features: 1 0.138 IN. DIA THREADED HOLE ON HUB FOR POSITIONING IN; Body Style: PLAIN, SOLID. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3020-00-725-3849 still in active supply?

NSN 3020-00-725-3849 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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