The Cover,fluid Filter, cataloged under National Stock Number 4330-01-332-0257, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. The manufacturer of record is Haywardindl. Products, Inc.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4330-01-332-0257 |
| Primary Part Number | 8T31139M |
| Item Name | Cover,fluid Filter |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Haywardindl. Products, Inc. |
| Status | ACTIVE |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 8T31139M PRIMARY | Haywardindl. Products, Inc. (USA) |
| ST50F-B-150REVE 8IN PC 4 | Haywardindl. Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| ST31139M | 5/9 Secondary reference Haywardindl. Products, Inc. |
| ST50F-B | D/9 Drawing number reference only Haywardindl. Products, Inc. |
NSN 4330-01-332-0257 is a Cover,fluid Filter, manufactured by Haywardindl. Products, Inc., classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-332-0257 has 2 manufacturer part numbers on file: 8T31139M (Haywardindl. Products, Inc.), ST50F-B-150REVE 8IN PC 4 (Haywardindl. Products, Inc.).
Key specifications for 8T31139M: Material: COPPER ALLOY. 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.