The Gear,spur, cataloged under National Stock Number 3020-01-417-2188, 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13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-417-2188 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 25.4 MILLIMETERS BOTH ENDS MM |
| Teeth Quantity | 34 |
| Body Style | PLAIN, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM TEETH |
| Hardness Rating | 48.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM SPLINE |
| Style Designator | HUBLESS |
| Pitch Diameter | 86.3 MILLIMETERS NOMINAL MM |
| Spline Quantity | 18 BOTH ENDS |
| Nominal Outside Diameter | 93.0 MILLIMETERS MM |
| Pressure Angle | 20.0000 DEGREES |
| Spline Pitch Diameter | 22.8 MILLIMETERS NOMINAL BOTH ENDS MM |
| Face Nominal Width | 14.9 MILLIMETERS MM |
| 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 |
|---|---|
| 2798988 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-417-2188 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4710-01-661-3241. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-417-2188: Bore Nominal Diameter: 25.4 MILLIMETERS BOTH ENDS MM; Teeth Quantity: 34; Body Style: PLAIN, 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.