The Gear,spur, cataloged under National Stock Number 3020-01-013-0013, 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 Astronautics Corporation of America. Government technical data includes 19 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-013-0013 |
| Primary Part Number | 104128 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Astronautics Corporation of America |
| Status | ACTIVE |
| Keyway Nominal Width | 0.062 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Teeth Quantity | 40 |
| Surface Treatment Document and Classification | MIL-STD-171,FINISH N0. 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Mounting Hole Type and Quantity | 1 PLAIN TRANSVERSELY THROUGH FACE |
| Mounting Hole Nominal Diameter | 0.031 INCHES TRANSVERSELY THROUGH FACE IN |
| Style Designator | HUBLESS |
| Material Document and Classification | MIL-S-7720,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.4166 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 0.437 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.183 INCHES BOTH ENDS IN |
| Surface Treatment | PASSIVATE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 OVERALL |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.034 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 |
|---|---|
| 104128 PRIMARY | Astronautics Corporation of America (USA) |
NSN 3020-01-013-0013 is a Gear,spur, manufactured by Astronautics Corporation of America, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-013-0013 has 1 manufacturer part number on file: 104128 (Astronautics Corporation of America).
1 possible match (shared part number, not a government interchangeability claim): 4210-01-446-4164. Verify interchangeability with system specifications before substitution.
Key specifications for 104128: Keyway Nominal Width: 0.062 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Teeth Quantity: 40; Surface Treatment Document and Classification: MIL-STD-171,FINISH N0. 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL. 19 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 3020-01-013-0013 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.