The Gear,spur, cataloged under National Stock Number 3020-00-239-0245, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-239-0245 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.500 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.875 INCHES BOTH ENDS IN |
| Teeth Quantity | 14 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 11 |
| Hardness Rating | 92.0 ROCKWELL C MINIMUM AND 98.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Pitch Diameter | 3.5000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 3.900 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.125 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 2.000 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 |
|---|---|
| D2-9324-116 | 3/9 Design control — primary reference Usm Corp Sub of Emhart Industries Inc Farrel Co Div |
| D2-10390PC29 | 5/9 Secondary reference Usm Corp Sub of Emhart Industries Inc Farrel Co Div |
| AM57S42-48PC112 | 5/2 Secondary reference U.S. Government activity |
| D2-8653PC112 | 5/9 Secondary reference Usm Corp Sub of Emhart Industries Inc Farrel Co Div |
| D2-9324-116 | C/1 Advisory reference — outside the item-of-supply concept Usm Corp Sub of Emhart Industries Inc Farrel Co Div |
NSN 3020-00-239-0245 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-239-0245: Keyway Nominal Width: 0.500 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.875 INCHES BOTH ENDS IN; Teeth Quantity: 14; Body Style: PLAIN, SOLID. 15 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.