The Cover,upper Joint, cataloged under National Stock Number 2590-01-171-4656, is classified within Federal Supply Class 2590 (Miscellaneous Vehicular Components) of the Vehicular Equipment Components group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2590-01-171-4656 |
| Primary Part Number | 12266037 |
| Item Name | Cover,upper Joint |
| FSC / FSG | 2590 / 25 — Miscellaneous Vehicular Components |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL 4130 STEEL FORGING,SPEC MIL-S-6758;DIAMETER 9.120 INCHES;THICKNESS 4.570 INCHES;FOR FURTHER INFORMATION SEE DRWG 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 |
|---|---|
| 12266037 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12266037 | 5/9 Secondary reference Drs Sustainment Systems, Inc. |
NSN 2590-01-171-4656 is a Cover,upper Joint, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2590, Miscellaneous Vehicular Components. Status: active.
NSN 2590-01-171-4656 has 1 manufacturer part number on file: 12266037 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12266037: General Characteristics Item Description: MATERIAL 4130 STEEL FORGING,SPEC MIL-S-6758;DIAMETER 9.120 INCHES;THICKNESS 4.570 INCHES;FOR FURTHER INFORMATION SEE DRWG IN. 1 specification is 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 2590-01-171-4656 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.