The Gear,bevel, cataloged under National Stock Number 3020-01-090-8049, 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 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-090-8049 |
| Primary Part Number | 12270448 |
| 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 |
| Teeth Quantity | 39 |
| Surface Treatment Document and Classification | MIL-STD-171 MIL STD ALL TREATMENT RESPONSES OVERALL |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 67.0000 DEGREES |
| Nominal Distance Between Body Face and Protruding Hub End | 0.737 INCHES FIRST END IN |
| Teeth Type | STRAIGHT |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 0.737 INCHES IN |
| Style Designator | SIDE FACE, BACK HUB PROTRUDING |
| Material Document and Classification | MIL-S-46172 MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| Pitch Diameter | 1.9500 INCHES NOMINAL IN |
| Nominal Outside Diameter | 1.973 INCHES IN |
| Surface Treatment | PHOSPHATE MANGANESE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Body Recess Nominal Depth | 0.380 INCHES FIRST END IN |
| Face Nominal Width | 0.310 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 12270448 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 3020010908049 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 3020-01-090-8049 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 3020-01-090-8049 has 1 manufacturer part number on file: 12270448 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12270448: Teeth Quantity: 39; Surface Treatment Document and Classification: MIL-STD-171 MIL STD ALL TREATMENT RESPONSES OVERALL; Body Style: PLAIN, SOLID; Pitch Angle: 67.0000 DEGREES. 17 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 3020-01-090-8049 has DEMIL Code B. 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.