The O-Ring, cataloged under National Stock Number 5331-01-214-3764, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Harris Environmental Systems, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Harris Environmental Systems, Inc. (CAGE 56760) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-214-3764 |
| Primary Part Number | D-2656-2PC40 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Harris Environmental Systems, 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 | Y |
| Part Number | Manufacturer |
|---|---|
| D-2656-2PC40 | Harris Environmental Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 22546-112 | 3/1 Design control — primary reference Danfoss Power Solutions II, Llc |
| LL-HX3-7933 | 5/9 Secondary reference Defense Logistics Agency Dba Defense Supply Center Philadelphia |
NSN 5331-01-214-3764 is a O-Ring, manufactured by Harris Environmental Systems, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-214-3764 has 1 manufacturer part number on file: D-2656-2PC40 (Harris Environmental Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-255-3377. 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.