The O-Ring, cataloged under National Stock Number 5331-01-186-4346, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Circor Naval Solutions Llc Dba Warren Pumps (CAGE 63857) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-186-4346 |
| Primary Part Number | BK110 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| 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) |
| Part Number | Manufacturer |
|---|---|
| BK110 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| Reference | Meaning |
|---|---|
| HY020Q175 | 5/9 Secondary reference Pentair Pump Group, Inc. Dba Fairbanks Morse Pump |
| 999R0142 PIECE 29 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
| HY02Q175 | 5/9 Secondary reference Pentair Pump Group, Inc. Dba Fairbanks Morse Pump |
NSN 5331-01-186-4346 is a O-Ring, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-186-4346 has 1 manufacturer part number on file: BK110 (Circor Naval Solutions Llc Dba Warren Pumps).
1 possible match (shared part number, not a government interchangeability claim): 4240-01-682-3708. Verify interchangeability with system specifications before substitution.
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.