The O-Ring, cataloged under National Stock Number 5331-00-401-0812, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-401-0812 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | ACTIVE |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Outside Diameter | 2.193 INCHES NOMINAL IN |
| Elongation Percentage | 250 MAXIMUM |
| Center Hole Diameter | 1.977 INCHES MINIMUM AND 1.997 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 |
| Reference | Meaning |
|---|---|
| 2-136E529-6 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| M22050-1-136 | 5/9 Secondary reference Sae International Dba Sae International |
| M22050-1-136 | 2/2 Government specification standardization U.S. Government activity |
| MIL-DTL-22050 | 4/1 Identification reference U.S. Government activity |
| M22050-1-136 | 5/9 Secondary reference U.S. Government activity |
| 2-136E529-6 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| AS568-136MIL-G-22050 GR1 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-00-401-0812 is a O-Ring, classified under FSC 5331, O-ring. Status: active.
Key specifications for 5331-00-401-0812: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Outside Diameter: 2.193 INCHES NOMINAL IN; Elongation Percentage: 250 MAXIMUM; Center Hole Diameter: 1.977 INCHES MINIMUM AND 1.997 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.