The Gear,spur, cataloged under National Stock Number 3020-00-283-2229, 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 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-283-2229 |
| Primary Part Number | 139C6456 |
| 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 | 0.779 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.920 INCHES BOTH ENDS IN |
| Teeth Quantity | 18 |
| Body Style | WEBBED, OFFSET, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.120 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.080 INCHES SECOND END IN |
| Precision Classification | QUALITY NUMBER 9 |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-S-624,COLD FINISHED FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.3519 INCHES MINIMUM AND 2.3529 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 23 BOTH ENDS |
| Nominal Outside Diameter | 2.587 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Spline Pitch Diameter | 0.7188 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 0.520 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 139C6456 | Gerhardt Gear Co, Inc (USA) |
| 139C6456 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| Reference | Meaning |
|---|---|
| 3020PL0662967 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 3020-00-283-2229 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 3020-00-283-2229 has 2 manufacturer part numbers on file: 139C6456 (Gerhardt Gear Co, Inc), 139C6456 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 139C6456: Bore Nominal Diameter: 0.779 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.920 INCHES BOTH ENDS IN; Teeth Quantity: 18; Body Style: WEBBED, OFFSET, SOLID. 20 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.
NSN 3020-00-283-2229 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.