The Gear,spur, cataloged under National Stock Number 3020-00-517-2147, 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 Ambac International Corporation Div Ambac International. Government technical data includes 11 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-517-2147 |
| Primary Part Number | 50865-8 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ambac International Corporation Div Ambac International |
| Status | ACTIVE |
| Teeth Quantity | 136 |
| Body Style | PLAIN, SOLID |
| Precision Classification | QUALITY NUMBER 5 OR QUALITY NUMBER 6 |
| Style Designator | HUBLESS |
| Material Document and Classification | QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.8310 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Pressure Angle | 14.5000 DEGREES |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Attachment Method | MOUNTING HOLE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 50865-8 PRIMARY | Ambac International Corporation Div Ambac International (USA) |
| Reference | Meaning |
|---|---|
| R11249 | 5/9 Secondary reference Seeburg Corp the Seeburg Products Div |
| 206-418 | 5/2 Secondary reference U.S. Government activity |
| 50865-8MK5M0D2 | 5/9 Secondary reference Arma Div Ambac Industries Inc |
| 979-1B461 | 5/9 Secondary reference Gap Instrument Corp |
| 50865-8 | 5/9 Secondary reference Arma Div Ambac Industries Inc |
| B21349 | 5/9 Secondary reference U.S. Government activity |
| 979-1B461 | 5/9 Secondary reference Advanced Logic Resources Inc Dba Alr |
NSN 3020-00-517-2147 is a Gear,spur, manufactured by Ambac International Corporation Div Ambac International, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-517-2147 has 1 manufacturer part number on file: 50865-8 (Ambac International Corporation Div Ambac International).
1 possible match (shared part number, not a government interchangeability claim): 5306-01-317-0405. Verify interchangeability with system specifications before substitution.
Key specifications for 50865-8: Teeth Quantity: 136; Body Style: PLAIN, SOLID; Precision Classification: QUALITY NUMBER 5 OR QUALITY NUMBER 6; Style Designator: HUBLESS. 11 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.