The Gear,spur, cataloged under National Stock Number 3020-01-044-7858, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-044-7858 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.500 INCHES COUNTERBORE FIRST END IN |
| Teeth Quantity | 54 |
| Surface Treatment Document and Classification | MIL-F-14072,FINISH NO. -313 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 0.562 INCHES COUNTERBORE FIRST END IN |
| Bore Style | W/COUNTERBORE COUNTERBORE FIRST END |
| Style Designator | HUBLESS |
| Pitch Diameter | 1.1250 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 1.167 INCHES IN |
| Surface Treatment | NICKEL OVERALL |
| Pressure Angle | 14.5000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Counterbore Nominal Depth | 0.060 INCHES COUNTERBORE FIRST END IN |
| Face Nominal Width | 0.125 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 |
| Reference | Meaning |
|---|---|
| SM-B-690449 | 3/2 Design control — primary reference U.S. Government activity |
| G143 | 3/1 Design control — primary reference Altra Industrial Motion Corp. |
NSN 3020-01-044-7858 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 3439-01-411-5720, 3439-01-411-5721, 5935-01-447-6878. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-044-7858: Bore Nominal Diameter: 0.500 INCHES COUNTERBORE FIRST END IN; Teeth Quantity: 54; Surface Treatment Document and Classification: MIL-F-14072,FINISH NO. -313 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Body Style: PLAIN, SOLID. 15 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.