The Ring,wearing, cataloged under National Stock Number 4320-01-237-0288, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4320-01-237-0288 |
| Primary Part Number | BS4-1686 PIECE 8 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| 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 |
|---|---|
| BS4-1686 PIECE 8 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| S5801-521165 PIECE 8 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| S5801-521165 | D/9 Drawing number reference only Naval Sea Systems Command |
| BS4-1686 | D/9 Drawing number reference only Circor Naval Solutions Llc Dba Warren Pumps |
NSN 4320-01-237-0288 is a Ring,wearing, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-237-0288 has 2 manufacturer part numbers on file: BS4-1686 PIECE 8 (Circor Naval Solutions Llc Dba Warren Pumps), S5801-521165 PIECE 8 (Naval Sea Systems Command).
Key specifications for BS4-1686 PIECE 8: End Item Identification: WARREN STEAM PUMP CO. CENTRIFUGAL PUMP TYPE 1-SED-6. 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.