The Gear,spur, cataloged under National Stock Number 3020-00-950-7721, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-950-7721 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.531 INCHES BOTH ENDS IN |
| Teeth Quantity | 50 |
| Body Style | WEBBED, OFFSET, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.093 INCHES FIRST END IN |
| Nominal Overall Length | 1.969 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 10.0000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 19 BOTH ENDS |
| Nominal Outside Diameter | 10.406 INCHES IN |
| Spline Pitch Diameter | 2.3750 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 0.938 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 |
|---|---|
| 217399 | 3/2 Design control — primary reference U.S. Government activity |
| 217399 | 5/9 Secondary reference Clark Equipment Co |
NSN 3020-00-950-7721 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4935-01-227-2224, 5330-01-479-4361. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-950-7721: Bore Nominal Diameter: 2.531 INCHES BOTH ENDS IN; Teeth Quantity: 50; Body Style: WEBBED, OFFSET, SOLID; Bore Style: INVOLUTE SPLINE BOTH ENDS. 13 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.