The Gear,spur, cataloged under National Stock Number 3020-01-210-8771, 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 Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-210-8771 |
| Primary Part Number | 1004333-1 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division |
| Status | ACTIVE |
| Bore Nominal Diameter | 16.503 INCHES BOTH ENDS IN |
| Teeth Quantity | 104 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 12 PLAIN AND 3 THREADED AXIALLY THROUGH BODY FIRST END |
| Mounting Hole Nominal Diameter | 1.938 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Hardness Rating | 90.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 92.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Pitch Diameter | 26.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Mounting Hole Nominal Thread Size | 0.316 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Nominal Outside Diameter | 26.489 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Bolt Hole Circle Nominal Diameter | 24.062 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 1.000 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1004131 PIECE 30 | Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division (USA) |
| 1004333-1 PRIMARY | Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division (USA) |
| Reference | Meaning |
|---|---|
| 1004331-1 | C/1 Advisory reference — outside the item-of-supply concept Ecolaire Inc Baldwin-Hamilton Co Div |
| 1004131 | D/9 Drawing number reference only Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division |
| 1004333-1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 3020-01-210-8771 is a Gear,spur, manufactured by Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-210-8771 has 2 manufacturer part numbers on file: 1004131 PIECE 30 (Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division), 1004333-1 (Emerson Power Transmission Corporation Dba Emerson Div Emerson Power Transmission Division).
6 possible matches (shared part number, not a government interchangeability claim): 3010-01-211-4574, 3040-01-211-6743, 5315-01-211-8526. Verify interchangeability with system specifications before substitution.
Key specifications for 1004333-1: Bore Nominal Diameter: 16.503 INCHES BOTH ENDS IN; Teeth Quantity: 104; Body Style: PLAIN, SOLID; Bore Style: PLAIN BOTH ENDS. 18 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.