The Gear,internal, cataloged under National Stock Number 3020-00-951-9801, 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 Breeze-Eastern Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-951-9801 |
| Primary Part Number | BL-4586-1 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Breeze-Eastern Llc |
| Status | ACTIVE |
| Teeth Quantity | 38 |
| Body Style | PLAIN, SOLID |
| Flange Nominal Thickness | 0.093 INCHES IN |
| Flange Nominal Diameter | 1.124 INCHES IN |
| Teeth Type | SPUR |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 0.313 INCHES IN |
| Style Designator | FLANGED RING |
| Material Document and Classification | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.7917 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 0.9370 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP E4340 OVERALL |
| 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 |
|---|---|
| BL-4586-1 PRIMARY | Breeze-Eastern Llc (USA) |
| Reference | Meaning |
|---|---|
| BL-4586 | D/9 Drawing number reference only Breeze-Eastern Llc |
NSN 3020-00-951-9801 is a Gear,internal, manufactured by Breeze-Eastern Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-951-9801 has 1 manufacturer part number on file: BL-4586-1 (Breeze-Eastern Llc).
Key specifications for BL-4586-1: Teeth Quantity: 38; Body Style: PLAIN, SOLID; Flange Nominal Thickness: 0.093 INCHES IN; Flange Nominal Diameter: 1.124 INCHES IN. 14 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.