The O-Ring, cataloged under National Stock Number 5331-01-438-1664, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Leybold Usa Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5331-01-438-1664 |
| Primary Part Number | 239 70 411 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Leybold Usa Inc. |
| Status | ACTIVE |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| 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 |
|---|---|
| 239 70 411 PRIMARY | Leybold Usa Inc. (USA) |
| Reference | Meaning |
|---|---|
| 239 70 411 | 5/9 Secondary reference Leybold Vacuum Products Inc |
NSN 5331-01-438-1664 is a O-Ring, manufactured by Leybold Usa Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-438-1664 has 1 manufacturer part number on file: 239 70 411 (Leybold Usa Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-695-6905. Verify interchangeability with system specifications before substitution.
Key specifications for 239 70 411: Material: RUBBER FLUOROCARBON CLASS FPM. 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.