The O-Ring, cataloged under National Stock Number 5331-01-588-9393, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Spa Aeronautics Division - Pomigliano D'arco Site. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-588-9393 |
| Primary Part Number | NAS1611-015A |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site |
| Status | ACTIVE |
| Material Document and Classification | AMS 1613 ASSN STD SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 0.551 INCHES NOMINAL IN |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM |
| 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 |
|---|---|
| NAS1611-015A | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site (ITA) |
| Reference | Meaning |
|---|---|
| NAS1611-015A | 3/2 Design control — primary reference U.S. Government activity |
| 5331PL2036963 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| NAS1613 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5331-01-588-9393 is a O-Ring, manufactured by Leonardo Spa Aeronautics Division - Pomigliano D'arco Site, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-588-9393 has 1 manufacturer part number on file: NAS1611-015A (Leonardo Spa Aeronautics Division - Pomigliano D'arco Site).
Key specifications for NAS1611-015A: Material Document and Classification: AMS 1613 ASSN STD SINGLE MATERIAL RESPONSE; Center Hole Diameter: 0.551 INCHES NOMINAL IN; Material: RUBBER ETHYLENE-PROPYLENE CLASS EPM. 3 specifications are 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.