The O-Ring, cataloged under National Stock Number 5331-01-206-6125, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-206-6125 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | ACTIVE |
| Temp Rating | -70.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.125 INCHES NOMINAL IN |
| Outside Diameter | 7.012 INCHES NOMINAL IN |
| Hardness Rating | 80.0 SHORE DUROMETER A NOMINAL |
| Criticality Code Justification | ZZZY |
| Center Hole Diameter | 6.750 INCHES NOMINAL IN |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 2-216 E540-80 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 9550-137PC9 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 216-4498632 PC 9 | 5/1 Secondary reference U.S. Government activity |
| ARP568-261 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-01-206-6125 is a O-Ring, classified under FSC 5331, O-ring. Status: active.
Key specifications for 5331-01-206-6125: Temp Rating: -70.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.125 INCHES NOMINAL IN; Outside Diameter: 7.012 INCHES NOMINAL IN; Hardness Rating: 80.0 SHORE DUROMETER A NOMINAL. 8 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.