The O-Ring, cataloged under National Stock Number 5331-01-643-2486, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Aqua-Chem, Inc. Dba Aqua-Chem 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (CAGE 0EXU3) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-643-2486 |
| Primary Part Number | 853-10211-000 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Aqua-Chem, Inc. Dba Aqua-Chem 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 |
|---|---|
| 853-10211-000 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| Reference | Meaning |
|---|---|
| 701-D-9640 | D/9 Drawing number reference only Aqua-Chem, Inc. Dba Aqua-Chem Inc |
| 701-D-9640-18 | C/1 Advisory reference — outside the item-of-supply concept Aqua-Chem, Inc. Dba Aqua-Chem Inc |
NSN 5331-01-643-2486 is a O-Ring, manufactured by Aqua-Chem, Inc. Dba Aqua-Chem Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-643-2486 has 1 manufacturer part number on file: 853-10211-000 (Aqua-Chem, Inc. Dba Aqua-Chem Inc).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-643-2521. 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.