The Radiator,engine Coolant, cataloged under National Stock Number 2930-00-655-0221, is classified within Federal Supply Class 2930 (Engine Cooling System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 28 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2930-00-655-0221 |
| Primary Part Number | 6550221 |
| Item Name | Radiator,engine Coolant |
| FSC / FSG | 2930 / 29 — Engine Cooling System Components, Nonaircraft |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Tank Height | 6.531 INCHES NOMINAL FIRST TANK RIGHT SIDE6.531 INCHES NOMINAL FIRST TANK RIGHT SIDE IN |
| Tank Height | 6.531 INCHES NOMINAL SECOND TANK LEFT SIDE6.531 INCHES NOMINAL SECOND TANK LEFT SIDE IN |
| FSC Application Data | ENGINE NON-AIRCRAFTENGINE NON-AIRCRAFT |
| Core Width | 25.297 INCHES NOMINAL25.297 INCHES NOMINAL IN |
| Inlet Connection End Type | FLANGEDFLANGED |
| Filler Neck | NOT INCLUDEDNOT INCLUDED |
| Core Height | 6.844 INCHES NOMINAL6.844 INCHES NOMINAL IN |
| Tank Quantity | 1 FIRST TANK RIGHT SIDE1 FIRST TANK RIGHT SIDE |
| Tank Quantity | 1 SECOND TANK LEFT SIDE1 SECOND TANK LEFT SIDE |
| Tank Quantity | 1 THIRD TANK CENTER1 THIRD TANK CENTER |
| Outlet Connection End Quantity | 11 |
| Overall Thickness | 23.031 INCHES NOMINAL23.031 INCHES NOMINAL IN |
| Tank Thickness | 22.688 INCHES NOMINAL FIRST TANK RIGHT SIDE22.688 INCHES NOMINAL FIRST TANK RIGHT SIDE IN |
| Tank Thickness | 22.688 INCHES NOMINAL SECOND TANK LEFT SIDE22.688 INCHES NOMINAL SECOND TANK LEFT SIDE IN |
| Inlet Connection End Shape | ROUNDROUND |
| Core Material and Location | COPPER OVERALLCOPPER OVERALL |
| Tank Width | 26.922 INCHES NOMINAL FIRST TANK RIGHT SIDE26.922 INCHES NOMINAL FIRST TANK RIGHT SIDE IN |
| Tank Width | 5.000 INCHES NOMINAL SECOND TANK LEFT SIDE5.000 INCHES NOMINAL SECOND TANK LEFT SIDE IN |
| Inlet Connection End Quantity | 11 |
| Tank Location | CENTER THIRD TANK CENTERCENTER THIRD TANK CENTER |
| Tank Location | LEFT SIDE SECOND TANK LEFT SIDELEFT SIDE SECOND TANK LEFT SIDE |
| Tank Location | RIGHT SIDE FIRST TANK RIGHT SIDERIGHT SIDE FIRST TANK RIGHT SIDE |
| Mounting Feature | NOT INCLUDEDNOT INCLUDED |
| Valve Casing | NOT INCLUDEDNOT INCLUDED |
| Fan Shroud | NOT INCLUDEDNOT INCLUDED |
| Coolant Level Elbow Check Valve | NOT INCLUDEDNOT INCLUDED |
| Core Type | TUBE AND TUBE AND PLATE FIN LOCATION NOT OTHERWISE SPECIFIEDPLATE FIN LOCATION NOT OTHERWISE SPECIFIED |
| Outlet Connection End Shape | ROUNDROUND |
| 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 |
|---|---|
| 6550221 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| AD4704 | C/1 Advisory reference — outside the item-of-supply concept Modine Manufacturing Co |
| AD4704 | 3/9 Design control — primary reference Modine Mfg Co |
NSN 2930-00-655-0221 is a Radiator,engine Coolant, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2930, Engine Cooling System Components, Nonaircraft. Status: active.
NSN 2930-00-655-0221 has 1 manufacturer part number on file: 6550221 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 6550221: Tank Height: 6.531 INCHES NOMINAL FIRST TANK RIGHT SIDE6.531 INCHES NOMINAL FIRST TANK RIGHT SIDE IN; Tank Height: 6.531 INCHES NOMINAL SECOND TANK LEFT SIDE6.531 INCHES NOMINAL SECOND TANK LEFT SIDE IN; Overall Height: 6.844 INCHES NOMINAL6.844 INCHES NOMINAL IN; FSC Application Data: ENGINE NON-AIRCRAFTENGINE NON-AIRCRAFT. 28 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.