The Gear,spur, cataloged under National Stock Number 3020-00-517-2181, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-517-2181 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.688 INCHES FIRST END IN |
| Teeth Quantity | 38 |
| Body Style | PLAIN, SOLID |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 5 OR QUALITY NUMBER 6 |
| Nominal Overall Length | 0.500 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 1.1870 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 1.250 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Face Nominal Width | 0.250 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 |
|---|---|
| 979-1B384 | 3/9 Design control — primary reference Advanced Logic Resources Inc Dba Alr |
| R11686 | 5/9 Secondary reference Seeburg Corp the Seeburg Products Div |
| 9234-3 | 5/9 Secondary reference Arma Div Ambac Industries Inc |
| 9234-3 | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
| 979-1B384 | 5/9 Secondary reference Gap Instrument Corp |
| 206-315 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-00-517-2181 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): 5330-01-292-6132, 4920-01-296-1583, 5985-01-716-4666. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-517-2181: Hub Nominal Diameter: 0.688 INCHES FIRST END IN; Teeth Quantity: 38; Body Style: PLAIN, SOLID; Nominal Distance Between Body Face and Protruding Hub End: 0.250 INCHES FIRST END IN. 12 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.