The Gear,spur, cataloged under National Stock Number 3020-01-307-3011, 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 Lockheed Martin Corporation Div Rms. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-307-3011 |
| Primary Part Number | T-8003157-4 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.000 INCHES BOTH ENDS IN |
| Teeth Quantity | 81 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 1.781 INCHES BOTH ENDS IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Style Designator | HUBLESS |
| Pitch Diameter | 3.3750 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 3.458 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Counterbore Nominal Depth | 0.094 INCHES BOTH ENDS IN |
| Face Nominal Width | 0.250 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 |
|---|---|
| T-8003157-4 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| 298377-4 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 298377 | D/9 Drawing number reference only Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 3020-01-307-3011 is a Gear,spur, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-307-3011 has 2 manufacturer part numbers on file: T-8003157-4 (Lockheed Martin Corporation Div Rms), 298377-4 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
6 possible matches (shared part number, not a government interchangeability claim): 3020-01-307-8009, 3020-01-307-8874, 3020-01-307-8875. Verify interchangeability with system specifications before substitution.
Key specifications for T-8003157-4: Bore Nominal Diameter: 1.000 INCHES BOTH ENDS IN; Teeth Quantity: 81; Body Style: PLAIN, SOLID; Counterbore Nominal Diameter: 1.781 INCHES BOTH ENDS IN. 13 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.