The O-Ring, cataloged under National Stock Number 5331-01-366-7840, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hansome Energy Systems Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Hansome Energy Systems Inc (CAGE 51802) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-366-7840 |
| Primary Part Number | HAN4443-1 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Hansome Energy Systems Inc |
| 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 |
|---|---|
| HAN4443-1 PRIMARY | Hansome Energy Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| D-800-145ITEM130 | 5/9 Secondary reference Hansome Energy Systems Inc |
NSN 5331-01-366-7840 is a O-Ring, manufactured by Hansome Energy Systems Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-366-7840 has 1 manufacturer part number on file: HAN4443-1 (Hansome Energy Systems Inc).
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.