The Gear,internal, cataloged under National Stock Number 3020-01-287-2170, 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 19 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-287-2170 |
| Primary Part Number | 12364285 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Teeth Quantity | 90 |
| Body Style | PLAIN, SOLID |
| Flange Nominal Thickness | 0.540 INCHES IN |
| Flange Nominal Diameter | 11.000 INCHES IN |
| Mounting Hole Type and Quantity | 8 COUNTERSUNK AND 8 THREADED AXIALLY THROUGH FLANGE |
| Mounting Hole Nominal Diameter | 0.260 INCHES AXIALLY THROUGH FLANGE IN |
| Teeth Type | SPUR |
| Nominal Overall Length | 0.650 INCHES IN |
| Style Designator | FLANGED RING |
| Material Document and Classification | AST-322 ASSN STD 1ST MATERIAL RESPONSE OR MIL-S-46172 GRADE D MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 9.0000 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Mounting Hole Nominal Thread Size | 0.250 INCHES AXIALLY THROUGH FLANGE IN |
| Nominal Outside Diameter | 9.651 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4620H OR STEEL COMP 8620 OVERALL |
| Bolt Hole Circle Nominal Diameter | 10.400 INCHES AXIALLY THROUGH FLANGE IN |
| Mounting Hole Thread Series Designator | UNF AXIALLY THROUGH FLANGE |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| 12364285 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3020-01-287-2170 is a Gear,internal, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-287-2170 has 1 manufacturer part number on file: 12364285 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12364285: Teeth Quantity: 90; Body Style: PLAIN, SOLID; Flange Nominal Thickness: 0.540 INCHES IN; Flange Nominal Diameter: 11.000 INCHES IN. 19 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 3020-01-287-2170 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.