The Gear,spur, cataloged under National Stock Number 3020-00-277-2108, 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 30 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-277-2108 |
| Primary Part Number | 10866266 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.356 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.151 INCHES FIRST END IN |
| Teeth Quantity | 55 |
| Surface Treatment Document and Classification | MIL-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Counterbore Nominal Diameter | 2.500 INCHES BOTH ENDS IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.562 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.031 INCHES FIRST END IN |
| First Step Nominal Length | 0.562 INCHES SECOND END IN |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM TEETH |
| Nominal Overall Length | 4.344 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-S-13048 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 13.9493 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 3.562 INCHES SECOND END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 18 BOTH ENDS |
| End Nominal Length | 0.973 INCHES SECOND END IN |
| Nominal Outside Diameter | 14.322 INCHES IN |
| Surface Treatment | PHOSPHATE OVERALL |
| End Nominal Diameter | 3.151 INCHES SECOND END IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL COMP 4817H OVERALL |
| Counterbore Nominal Depth | 0.500 INCHES SECOND END IN |
| Counterbore Nominal Depth | 0.343 INCHES FIRST END IN |
| Spline Pitch Diameter | 2.3567 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 1.750 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 |
|---|---|
| 10866266 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 3020002772108 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 3020002772108 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 3020-00-277-2108 is a Gear,spur, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-277-2108 has 1 manufacturer part number on file: 10866266 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 10866266: Bore Nominal Diameter: 2.356 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.151 INCHES FIRST END IN; Teeth Quantity: 55; Surface Treatment Document and Classification: MIL-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 30 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.