The Pump Assembly,oil,c, cataloged under National Stock Number 4320-01-159-6257, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Steward Machine Co Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4320-01-159-6257 |
| Primary Part Number | 357A1 |
| Item Name | Pump Assembly,oil,c |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Steward Machine Co Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 357A1 PRIMARY | Steward Machine Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 60-137 PIECE A1 | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
| 357A1 | 3/9 Design control — primary reference Hardie-Tynes Co., Inc. |
NSN 4320-01-159-6257 is a Pump Assembly,oil,c, manufactured by Steward Machine Co Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-159-6257 has 1 manufacturer part number on file: 357A1 (Steward Machine Co Inc).
Key specifications for 357A1: End Item Identification: FAN VNXL FRD STM TDVN. 0 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.