The Gear,bevel, cataloged under National Stock Number 3020-01-084-9845, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-084-9845 |
| Primary Part Number | 12270446 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Hub Nominal Diameter | 0.998 INCHES SECOND END IN |
| Teeth Quantity | 25 |
| Surface Treatment Document and Classification | MIL-P-16232,TYPE M,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 30.7624 DEGREES |
| Nominal Distance Between Body Face and Protruding Hub End | 1.250 INCHES SECOND END IN |
| Teeth Type | STRAIGHT |
| Hardness Rating | 29.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 2.920 INCHES IN |
| Style Designator | PERIPHERAL FACE, BACK HUB PROTRUDING |
| Material Document and Classification | MIL-S-46172,GRADE D MIL SPEC SINGLE MATERIAL RESPONSE OR ASTM-A322 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM-A331 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.0833 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 2.259 INCHES IN |
| Surface Treatment | PHOSPHATE MANGANESE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4140 OR STEEL COMP 8640 OVERALL |
| Face Nominal Width | 0.500 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 |
|---|---|
| 12270446 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 1015010849845 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 3020-01-084-9845 is a Gear,bevel, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-084-9845 has 1 manufacturer part number on file: 12270446 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12270446: Hub Nominal Diameter: 0.998 INCHES SECOND END IN; Teeth Quantity: 25; Surface Treatment Document and Classification: MIL-P-16232,TYPE M,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Body Style: PLAIN, SOLID. 18 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.