PartsTable TECHNICAL DATA SHEET
NSN 3020-01-084-0556Government record, cited

Gear, Spur3020-01-084-0556

NSN 3020-01-084-0556 · NIIN 010840556 · Part number 845-4687756 PC10
Triumph Manufacturing Company, Inc. · FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain · FSG 30 — Mechanical Power Transmission Equipment · CAGE 8X098
Government record, cited
NSN 3020-01-084-0556 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-084-0556. Manufacturer of record part number: 845-4687756 PC10.
Also searched as  3020-01-084-0556 · 3020010840556 · NIIN 010840556 · 01-084-0556 · FSC 3020 Gears, Pulleys, Sprockets, and Transmission Chain · CAGE 8X098 · 845-4687756 PC10 · 4775959-PC6 · 4775959-0006 · 845-4687756 · 845-4687756 PIECE 10
Nearby stock numbers  ·
Features
  • Gear,spur — FSC 3020
  • Bore Nominal Diameter: 0.188 INCHES COUNTER BORE SECOND END IN
  • Teeth Quantity: 40
  • Body Style: WEBBED, OFFSET, SOLID
  • Counterbore Nominal Diameter: 0.754 INCHES COUNTER BORE SECOND END IN
  • Bore Style: W/COUNTERBORE COUNTER BORE SECOND END
  • Nominal Distance Between Body Face and Protruding Hub End: 0.443 INCHES FIRST END IN
  • First Step Nominal Length: 0.318 INCHES FIRST END IN
Identification
  • NSN: 3020-01-084-0556
  • NIIN: 010840556
  • FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
  • FSG: 30 — Mechanical Power Transmission Equipment
  • Primary part number: 845-4687756 PC10
  • Manufacturer: Triumph Manufacturing Company, Inc.
General Description

The Gear,spur, cataloged under National Stock Number 3020-01-084-0556, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Triumph Manufacturing Company, Inc.. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-01-084-0556
Primary Part Number845-4687756 PC10
Item NameGear,spur
FSC / FSG3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain
ManufacturerTriumph Manufacturing Company, Inc.
StatusACTIVE
Bore Nominal Diameter0.188 INCHES COUNTER BORE SECOND END IN
Teeth Quantity40
Body StyleWEBBED, OFFSET, SOLID
Counterbore Nominal Diameter0.754 INCHES COUNTER BORE SECOND END IN
Bore StyleW/COUNTERBORE COUNTER BORE SECOND END
Nominal Distance Between Body Face and Protruding Hub End0.443 INCHES FIRST END IN
First Step Nominal Length0.318 INCHES FIRST END IN
Style DesignatorPROTRUDING HUB, RECESSED BODY
Pitch Diameter1.8141 INCHES NOMINAL IN
Tooth FormSTANDARD
First Step Nominal Diameter1.004 INCHES FIRST END IN
Hub Style Designator1 STEP FIRST END
End Nominal Length0.125 INCHES FIRST END IN
Nominal Outside Diameter1.905 INCHES IN
End Nominal Diameter0.500 INCHES FIRST END IN
Pressure Angle14.5000 DEGREES
MaterialCOPPER ALLOY OVERALL
Counterbore Nominal Depth0.125 INCHES COUNTER BORE SECOND END IN
Face Nominal Width0.312 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3020-01-084-05572642-982-03 PC 5 POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-092-04093642-982-03-PC11 POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-092-11314775959-0009 POSSIBLE MATCH
GEAR SECTOR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-092-11942642-982-03,PC3 POSSIBLE MATCH
GEAR SECTOR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-131-5788845-4775959 ITEM 20 POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Ship Systems Command
3040-01-148-95274775959-0034 POSSIBLE MATCH
SHAFT,INPUT
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-151-44944775959-0007 POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-153-9038845-4775959-0026 POSSIBLE MATCH
GEAR,PIN
Possible match (shared part number)Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
845-4687756 PC10 Triumph Manufacturing Company, Inc. (USA)
Reference documents
ReferenceMeaning
4775959-PC6 5/2 Secondary reference
U.S. Government activity
4775959-0006 3/2 Design control — primary reference
U.S. Government activity
845-4687756 D/9 Drawing number reference only
U.S. Government activity
845-4687756 PIECE 10 5/2 Secondary reference
U.S. Government activity
Related Parts
3020-01-084-0557POSSIBLE MATCH
GEAR,SPUR
2642-982-03 PC 5
3020-01-092-0409POSSIBLE MATCH
GEAR,SPUR
3642-982-03-PC11
3020-01-092-1131POSSIBLE MATCH
GEAR SECTOR,SPUR
4775959-0009
3020-01-092-1194POSSIBLE MATCH
GEAR SECTOR,SPUR
2642-982-03,PC3
3040-01-131-5788POSSIBLE MATCH
SHAFT,SHOULDERED
845-4775959 ITEM 20
3040-01-148-9527POSSIBLE MATCH
SHAFT,INPUT
4775959-0034
3020-01-151-4494POSSIBLE MATCH
GEAR,SPUR
4775959-0007
3020-01-153-9038POSSIBLE MATCH
GEAR,PIN
845-4775959-0026

Frequently Asked Questions

What is NSN 3020-01-084-0556?

NSN 3020-01-084-0556 is a Gear,spur, manufactured by Triumph Manufacturing Company, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.

What part numbers are listed for NSN 3020-01-084-0556?

NSN 3020-01-084-0556 has 1 manufacturer part number on file: 845-4687756 PC10 (Triumph Manufacturing Company, Inc.).

What NSN replaces 3020-01-084-0556?

8 possible matches (shared part number, not a government interchangeability claim): 3020-01-084-0557, 3020-01-092-0409, 3020-01-092-1131. Verify interchangeability with system specifications before substitution.

What are the specifications of 845-4687756 PC10?

Key specifications for 845-4687756 PC10: Bore Nominal Diameter: 0.188 INCHES COUNTER BORE SECOND END IN; Teeth Quantity: 40; Body Style: WEBBED, OFFSET, SOLID; Counterbore Nominal Diameter: 0.754 INCHES COUNTER BORE SECOND END IN. 19 specifications are documented in the U.S. Government catalog.

Is NSN 3020-01-084-0556 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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