The Thermo Motor Assembly, cataloged under National Stock Number 4440-01-103-4978, is classified within Federal Supply Class 4440 (Driers, Dehydrators, and Anhydrators) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Dutch Valley Supply Co.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4440-01-103-4978 |
| Primary Part Number | A20858-501 |
| Item Name | Thermo Motor Assembly |
| FSC / FSG | 4440 / 44 — Driers, Dehydrators, and Anhydrators |
| Manufacturer | Dutch Valley Supply Co. |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF BRACKET PART NO. 20859,THERMO MOTOR PART NO. 20751 |
| 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 |
|---|---|
| A20858-501 PRIMARY | Dutch Valley Supply Co. (USA) |
| A20858-501 | Dielectric, Llc (USA) |
| Reference | Meaning |
|---|---|
| A20858-501 | 5/2 Secondary reference U.S. Government activity |
| A20858-501 | 3/9 Design control — primary reference Spx Corporation Dba Dielectric Communications Div Spx Communication Technologies |
NSN 4440-01-103-4978 is a Thermo Motor Assembly, manufactured by Dutch Valley Supply Co., classified under FSC 4440, Driers, Dehydrators, and Anhydrators. Status: active.
NSN 4440-01-103-4978 has 2 manufacturer part numbers on file: A20858-501 (Dutch Valley Supply Co.), A20858-501 (Dielectric, Llc).
Key specifications for A20858-501: General Characteristics Item Description: CONSISTS OF BRACKET PART NO. 20859,THERMO MOTOR PART NO. 20751; End Item Identification: AN/MPS-T1. 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.
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.