The Gear,spur, cataloged under National Stock Number 3020-00-321-3900, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-321-3900 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 4 THREADED AXIALLY THROUGH BODY FIRST END |
| Style Designator | PROTRUDING HUB |
| Hub Style Designator | PINNED FIRST END |
| Mounting Hole Nominal Thread Size | 0.112 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Thread Quantity Per Inch | 40 AXIALLY THROUGH BODY FIRST END |
| Bolt Hole Circle Nominal Diameter | 0.875 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| 164B8169P1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-321-3900 is a Gear,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-321-3900: Body Style: PLAIN, SOLID; Bore Style: PLAIN BOTH ENDS; Mounting Hole Type and Quantity: 4 THREADED AXIALLY THROUGH BODY FIRST END; Style Designator: PROTRUDING HUB. 10 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.