The Gear,spur, cataloged under National Stock Number 3020-01-479-7737, 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 Bath Iron Works Corporation. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-479-7737 |
| Primary Part Number | 44227-029 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Bath Iron Works Corporation |
| Status | ACTIVE |
| Keyway Nominal Width | 0.252 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.1255 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.437 INCHES SECOND END IN |
| Teeth Quantity | 22 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.250 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.187 INCHES SECOND END IN |
| First Step Nominal Length | 0.437 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-C-390, AL 863 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.7500 INCHES NOMINAL IN |
| Tooth Form | STUB |
| First Step Nominal Diameter | 2.437 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| End Nominal Length | 0.812 INCHES FIRST END IN |
| Nominal Outside Diameter | 2.950 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.647 INCHES BOTH ENDS IN |
| End Nominal Diameter | 2.000 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY 863 OVERALL |
| Face Nominal Width | 1.500 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 |
|---|---|
| 44227-029 PRIMARY | Bath Iron Works Corporation (USA) |
| 8100-1256-0305 PC NO 33 | Bath Iron Works Corporation (USA) |
| Reference | Meaning |
|---|---|
| 8100-1256-0305 | D/9 Drawing number reference only Bath Iron Works Corporation |
NSN 3020-01-479-7737 is a Gear,spur, manufactured by Bath Iron Works Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-479-7737 has 2 manufacturer part numbers on file: 44227-029 (Bath Iron Works Corporation), 8100-1256-0305 PC NO 33 (Bath Iron Works Corporation).
Key specifications for 44227-029: Keyway Nominal Width: 0.252 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.1255 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.437 INCHES SECOND END IN; Teeth Quantity: 22. 23 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.