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.
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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
Parameter
Value
NSN
3020-01-084-0556
Primary Part Number
845-4687756 PC10
Item Name
Gear,spur
FSC / FSG
3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain
Manufacturer
Triumph Manufacturing Company, Inc.
Status
ACTIVE
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
Style Designator
PROTRUDING HUB, RECESSED BODY
Pitch Diameter
1.8141 INCHES NOMINAL IN
Tooth Form
STANDARD
First Step Nominal Diameter
1.004 INCHES FIRST END IN
Hub Style Designator
1 STEP FIRST END
End Nominal Length
0.125 INCHES FIRST END IN
Nominal Outside Diameter
1.905 INCHES IN
End Nominal Diameter
0.500 INCHES FIRST END IN
Pressure Angle
14.5000 DEGREES
Material
COPPER ALLOY OVERALL
Counterbore Nominal Depth
0.125 INCHES COUNTER BORE SECOND END IN
Face Nominal Width
0.312 INCHES IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items8
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 5POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-092-04093642-982-03-PC11POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-092-11314775959-0009POSSIBLE MATCH
GEAR SECTOR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-092-11942642-982-03,PC3POSSIBLE MATCH
GEAR SECTOR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-131-5788845-4775959 ITEM 20POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Ship Systems Command
3040-01-148-95274775959-0034POSSIBLE MATCH
SHAFT,INPUT
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-151-44944775959-0007POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-153-9038845-4775959-0026POSSIBLE MATCH
GEAR,PIN
Possible match (shared part number)Naval Ship Systems Command
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.