The Gear,spur, cataloged under National Stock Number 3020-01-422-9579, 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 Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-422-9579 |
| Primary Part Number | 12373433 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service |
| Status | ACTIVE |
| Keyway Nominal Width | 0.958 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.376 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.650 INCHES BOTH ENDS IN |
| Teeth Quantity | 17 |
| Surface Treatment Document and Classification | MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.220 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.680 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 8 |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | ASTM-A322 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM-A331 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.0625 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 1.1820 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.241 INCHES BOTH ENDS IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.320 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 |
|---|---|
| 12373433 PRIMARY | Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service (USA) |
| Reference | Meaning |
|---|---|
| 12373433 | 5/9 Secondary reference U S Army Tank Automotive Command Amsta-Im-Mm |
| 12373433 | 5/9 Secondary reference General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
NSN 3020-01-422-9579 is a Gear,spur, manufactured by Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-422-9579 has 1 manufacturer part number on file: 12373433 (Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service).
Key specifications for 12373433: Keyway Nominal Width: 0.958 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.376 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.650 INCHES BOTH ENDS IN; Teeth Quantity: 17. 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.