The Gear,spur, cataloged under National Stock Number 3020-00-690-2937, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-690-2937 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.250 INCHES FIRST END IN |
| Teeth Quantity | 155 |
| Body Style | PLAIN, SOLID |
| Mounting Hole Type and Quantity | 3 PLAIN AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.281 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.125 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 2.4218 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 2.449 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.081 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 |
|---|---|
| 40434-1 | 3/2 Design control — primary reference U.S. Government activity |
| R875C63 | 5/9 Secondary reference Dorer Engineering Inc Dba O J Rodgers Company |
| 40434-1 | 5/9 Secondary reference Smiths Detection Inc. Dba Smiths Detection Inc Casc |
| R-875-C-63 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 3020-00-690-2937 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): 5325-00-815-4929. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-690-2937: Hub Nominal Diameter: 0.250 INCHES FIRST END IN; Teeth Quantity: 155; Body Style: PLAIN, SOLID; Mounting Hole Type and Quantity: 3 PLAIN AXIALLY THROUGH BODY FIRST END. 16 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.