The Gear,internal, cataloged under National Stock Number 3020-01-139-3496, 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 Naval Sea Systems Command. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-139-3496 |
| Primary Part Number | 803-5001048 REV A PIECE 56 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Helix Angle | 45.0000 DEGREES |
| Backlash Designation | GRADE E |
| Teeth Quantity | 42 |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 45.2499 DEGREES |
| Tooth Direction | RIGHT |
| Flange Nominal Thickness | 0.156 INCHES IN |
| Flange Nominal Diameter | 5.344 INCHES IN |
| Teeth Type | SPUR |
| Style Designator | FLANGED RING |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI/SAE 4340 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.2000 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Nominal Outside Diameter | 4.5156 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Face Nominal Width | 3.938 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 |
|---|---|
| 803-5001048 REV A PIECE 56 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-5001048 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-139-3496 is a Gear,internal, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-139-3496 has 1 manufacturer part number on file: 803-5001048 REV A PIECE 56 (Naval Sea Systems Command).
Key specifications for 803-5001048 REV A PIECE 56: Helix Angle: 45.0000 DEGREES; Backlash Designation: GRADE E; Teeth Quantity: 42; Body Style: PLAIN, SOLID. 17 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.