The Gear,spur, cataloged under National Stock Number 3020-00-252-0145, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Lake Shore Systems, Inc.. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-252-0145 |
| Primary Part Number | 142 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Keyway Nominal Width | 1.250 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 5.313 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 8.500 INCHES BOTH ENDS IN |
| Teeth Quantity | 70 |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Hardness Rating | 85.0 ROCKWELL C MINIMUM AND 91.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | FLUSH HUB |
| Pitch Diameter | 28.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 28.800 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 3.281 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 6.000 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 |
| Part Number | Manufacturer |
|---|---|
| 142 PRIMARY | Lake Shore Systems, Inc. (USA) |
NSN 3020-00-252-0145 is a Gear,spur, manufactured by Lake Shore Systems, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-252-0145 has 1 manufacturer part number on file: 142 (Lake Shore Systems, Inc.).
Key specifications for 142: Keyway Nominal Width: 1.250 INCHES BOTH ENDS IN; Bore Nominal Diameter: 5.313 INCHES BOTH ENDS IN; Hub Nominal Diameter: 8.500 INCHES BOTH ENDS IN; Teeth Quantity: 70. 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.