The Flow Block,center P, cataloged under National Stock Number 4330-01-337-8597, 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 Admiral Filter Company Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-337-8597 |
| Primary Part Number | 601331 |
| Item Name | Flow Block,center P |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Admiral Filter Company Llc |
| Status | ACTIVE |
| General Characteristics Item Description | MADE FROM ROD FLOW BLOCK CENTER P/N 203962 AND POLE FLOW BLOCK CENTER P/N 203963 |
| 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 |
|---|---|
| 601331 PRIMARY | Admiral Filter Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 601306 | D/9 Drawing number reference only Admiral Filter Company Llc |
NSN 4330-01-337-8597 is a Flow Block,center P, manufactured by Admiral Filter Company Llc, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-337-8597 has 1 manufacturer part number on file: 601331 (Admiral Filter Company Llc).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-677-3538. Verify interchangeability with system specifications before substitution.
Key specifications for 601331: General Characteristics Item Description: MADE FROM ROD FLOW BLOCK CENTER P/N 203962 AND POLE FLOW BLOCK CENTER P/N 203963; End Item Identification: PARMATIC OIL/WATER SEPARATOR P/N 601306. 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.