The O-Ring, cataloged under National Stock Number 5331-01-502-7567, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5331-01-502-7567 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | CANCELLED |
| Temp Rating | -90.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Material Document and Classification | MIL-R-25988 TYPE 1, CLASS 3, GRADE 75 MIL SPEC SINGLE MATERIAL RESPONSE |
| Specification/standard Data | 81349-MIL-R-25988/2/INACTIVE/ GOVERNMENT SPECIFICATION |
| Center Hole Diameter | 1.971 INCHES MINIMUM AND 2.007 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| AMS-R-25988 | 5/9 Secondary reference U.S. Government activity |
| AMS-R-25988 | 5/1 Secondary reference Sae International Dba Sae International |
| MIL-DTL-25988/2 | 4/1 Identification reference U.S. Government activity |
| MIL-R-25988 | 5/9 Secondary reference U.S. Government activity |
| M25988/2-033 | 2/2 Government specification standardization U.S. Government activity |
| S9412-033 | 5/1 Secondary reference U.S. Government activity |
| 10183663 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5331-01-502-7567 is a O-Ring, classified under FSC 5331, O-ring. Status: cancelled.
1 possible match (shared part number, not a government interchangeability claim): 5331-01-503-0357. Verify interchangeability with system specifications before substitution.
Key specifications for 5331-01-502-7567: Temp Rating: -90.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL; Material Document and Classification: MIL-R-25988 TYPE 1, CLASS 3, GRADE 75 MIL SPEC SINGLE MATERIAL RESPONSE. 7 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.
NSN 5331-01-502-7567 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.