The O-Ring, cataloged under National Stock Number 5331-00-419-2859, 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 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-419-2859 |
| Primary Part Number | AS568-251MIL-G-22050 GR1 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Outside Diameter | 5.387 INCHES NOMINAL IN |
| Elongation Percentage | 250 MAXIMUM |
| Center Hole Diameter | 5.086 INCHES MINIMUM AND 5.132 INCHES MAXIMUM IN |
| Material | RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR |
| 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 |
|---|---|
| AS568-251MIL-G-22050 GR1 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| ARP568-251 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| AS568-251MIL-G-22050 GR1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5331-00-419-2859 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-419-2859 has 1 manufacturer part number on file: AS568-251MIL-G-22050 GR1 (Sae International Dba Sae International).
Key specifications for AS568-251MIL-G-22050 GR1: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Outside Diameter: 5.387 INCHES NOMINAL IN; Elongation Percentage: 250 MAXIMUM; Center Hole Diameter: 5.086 INCHES MINIMUM AND 5.132 INCHES MAXIMUM IN. 5 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.