The Gear,spur, cataloged under National Stock Number 3020-01-230-0139, 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 General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 21 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 | 3020-01-230-0139 |
| Primary Part Number | 142D5083 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.751 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.000 INCHES BETWEEN BODY AND FLANGE IN |
| Teeth Quantity | 60 |
| Body Style | PLAIN, SOLID |
| Pilot Nominal Diameter | 1.498 INCHES IN |
| Flange Nominal Thickness | 0.249 INCHES IN |
| Flange Nominal Diameter | 2.920 INCHES IN |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 8 |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | FLANGED END WITH PILOT |
| Bore Nominal Depth | 1.791 INCHES BOTH ENDS IN |
| Pitch Diameter | 3.7500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Distance Between Outer Body Face and Inner Flange Face | 1.180 INCHES IN |
| Pilot Nominal Length | 0.362 INCHES IN |
| Nominal Outside Diameter | 3.850 INCHES IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.200 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 |
|---|---|
| 142D5083 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
NSN 3020-01-230-0139 is a Gear,spur, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-230-0139 has 1 manufacturer part number on file: 142D5083 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 142D5083: Bore Nominal Diameter: 0.751 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.000 INCHES BETWEEN BODY AND FLANGE IN; Teeth Quantity: 60; Body Style: PLAIN, SOLID. 21 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.