The O-Ring, cataloged under National Stock Number 5331-01-616-8659, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5331-01-616-8659 |
| Primary Part Number | AS3581-250 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Specification/standard Data | ATERIAL IS VITON MIL-R-83248/1;WEIGHT 0.25 LBS MANUFACTURERS STANDARD LBS |
| Center Hole Diameter | 4.940 INCHES MINIMUM AND 5.019 INCHES MAXIMUM IN |
| Material | RUBBER |
| 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 |
|---|---|
| AS3581-250 PRIMARY | Sae International Dba Sae International (USA) |
| AS568-250 | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| SAE-AS3581 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS3581-250 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5331-01-616-8659 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-616-8659 has 2 manufacturer part numbers on file: AS3581-250 (Sae International Dba Sae International), AS568-250 (Dante Valve Company).
Key specifications for AS3581-250: Specification/standard Data: ATERIAL IS VITON MIL-R-83248/1;WEIGHT 0.25 LBS MANUFACTURERS STANDARD LBS; Center Hole Diameter: 4.940 INCHES MINIMUM AND 5.019 INCHES MAXIMUM IN; End Item Identification: VALVE,RELIEF; Material: RUBBER. 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.