The O-Ring, cataloged under National Stock Number 5331-01-263-3851, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Cold Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-263-3851 |
| Primary Part Number | D841-3209 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Cold Llc |
| Status | ACTIVE |
| Material | RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM |
| 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 |
|---|---|
| D841-3209 | Cold Llc (USA) |
| Reference | Meaning |
|---|---|
| D844-3005-9 | 3/2 Design control — primary reference U.S. Government activity |
| D841-3209 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-01-263-3851 is a O-Ring, manufactured by Cold Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-263-3851 has 1 manufacturer part number on file: D841-3209 (Cold Llc).
Key specifications for D841-3209: Material: RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM. 1 specification is 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.