The Gear,spur, cataloged under National Stock Number 3020-01-026-2441, 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 29 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-026-2441 |
| Primary Part Number | BL9122 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Breeze-Eastern Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Teeth Quantity | 74 |
| Second Step Nominal Diameter | 1.001 INCHES FIRST END IN |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 1.250 INCHES SECOND END IN |
| Third Step Nominal Diameter | 1.500 INCHES FIRST END IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Mounting Hole Type and Quantity | 6 PLAIN AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 3.032 INCHES FIRST END IN |
| First Step Nominal Length | 1.875 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.190 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Second Step Nominal Length | 0.781 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB, RECESSED BODY |
| Material Document and Classification | MIL-S-5000,COND C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.3125 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 0.938 INCHES FIRST END IN |
| Hub Style Designator | 3 STEPS FIRST END |
| End Nominal Length | 0.625 INCHES FIRST END IN |
| Nominal Outside Diameter | 2.375 INCHES IN |
| End Nominal Diameter | 0.499 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Counterbore Nominal Depth | 0.344 INCHES SECOND END IN |
| Attachment Method | MOUNTING HOLE |
| Body Recess Nominal Depth | 0.124 INCHES SECOND END IN |
| Third Step Nominal Length | 0.626 INCHES FIRST END IN |
| Face Nominal Width | 0.468 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| BL9122 PRIMARY | Breeze-Eastern Llc (USA) |
NSN 3020-01-026-2441 is a Gear,spur, manufactured by Breeze-Eastern Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-026-2441 has 1 manufacturer part number on file: BL9122 (Breeze-Eastern Llc).
Key specifications for BL9122: Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Teeth Quantity: 74; Second Step Nominal Diameter: 1.001 INCHES FIRST END IN; Body Style: PLAIN, SOLID. 29 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.
NSN 3020-01-026-2441 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.