The Gear,spur, cataloged under National Stock Number 3020-00-294-8653, 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 17 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 | 3020-00-294-8653 |
| Primary Part Number | 50641-2 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ambac International Corporation Div Ambac International |
| Status | ACTIVE |
| Hub Nominal Diameter | 2.375 INCHES SECOND END IN |
| Teeth Quantity | 168 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.188 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.125 INCHES FIRST END IN |
| First Step Nominal Length | 0.063 INCHES FIRST END IN |
| Nominal Overall Length | 0.438 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 3.5005 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 2.500 INCHES FIRST END IN |
| End Nominal Length | 0.063 INCHES FIRST END IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | ALUMINUM ALLOY OVERALL |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.125 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 |
|---|---|
| 50641-2 PRIMARY | Ambac International Corporation Div Ambac International (USA) |
NSN 3020-00-294-8653 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 3020-00-294-8653 has 1 manufacturer part number on file: 50641-2 (Ambac International Corporation Div Ambac International).
1 possible match (shared part number, not a government interchangeability claim): 6740-00-832-7309. Verify interchangeability with system specifications before substitution.
Key specifications for 50641-2: Hub Nominal Diameter: 2.375 INCHES SECOND END IN; Teeth Quantity: 168; Body Style: PLAIN, SOLID; Bore Style: W/COUNTERBORE BOTH ENDS. 17 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 3020-00-294-8653 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.