The Gear,spur, cataloged under National Stock Number 3020-01-436-9499, 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 Naval Sea Systems Command. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-436-9499 |
| Primary Part Number | 6111405A-B6 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Keyway Nominal Width | 0.126 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.500 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.750 INCHES SECOND END IN |
| Teeth Quantity | 41 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.505 INCHES SECOND END IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-S-763,CL304 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.0500 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 2.150 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.328 INCHES BOTH ENDS IN |
| Pressure Angle | 14.3000 DEGREES |
| Material | STEEL COMP 304 OVERALL |
| Face Nominal Width | 0.375 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 |
|---|---|
| 581-6405752 FIND AHNA-B6 | Naval Sea Systems Command (USA) |
| 581-6405752-B6 | Naval Sea Systems Command (USA) |
| 6111405A-B6 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6405752 | D/9 Drawing number reference only U.S. Government activity |
| 6405752 | D/9 Drawing number reference only Naval Sea Systems Command |
| 6111405-B6 | 5/9 Secondary reference U.S. Government activity |
| 6111405-B6 | 5/9 Secondary reference Naval Sea Systems Command |
| 6111405A-B6 | 3/2 Design control — primary reference U.S. Government activity |
| 581-6405752-B6 | 5/2 Secondary reference U.S. Government activity |
| 581-6405752 FIND AHNA-B6 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-436-9499 is a Gear,spur, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-436-9499 has 3 manufacturer part numbers on file: 581-6405752 FIND AHNA-B6 (Naval Sea Systems Command), 581-6405752-B6 (Naval Sea Systems Command), 6111405A-B6 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-436-9516. Verify interchangeability with system specifications before substitution.
Key specifications for 6111405A-B6: Keyway Nominal Width: 0.126 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.500 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.750 INCHES SECOND END IN; Teeth Quantity: 41. 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.