The O-Ring, cataloged under National Stock Number 5331-01-007-8798, 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 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-007-8798 |
| Primary Part Number | AMS-R-25988 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Outside Diameter | 1.316 INCHES NOMINAL IN |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Elongation Percentage | 125 MAXIMUM |
| Center Hole Diameter | 1.165 INCHES MINIMUM AND 1.187 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| 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 |
|---|---|
| 754-4-37002-025 | Eaton Limited (GBR) |
| M25988/1-025 | International Seal and Packing Co Inc (USA) |
| AMS-R-25988 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| M25988/1-025 | 5/9 Secondary reference U.S. Government activity |
| 10163359 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| MIL-R-25988/1 | 5/9 Secondary reference U.S. Government activity |
| M25988/1-025 | 5/1 Secondary reference U.S. Government activity |
| AMS-R-25988 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5331-01-007-8798 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-007-8798 has 3 manufacturer part numbers on file: 754-4-37002-025 (Eaton Limited), M25988/1-025 (International Seal and Packing Co Inc), AMS-R-25988 (Sae International Dba Sae International).
10 possible matches (shared part number, not a government interchangeability claim): 5331-01-129-3145, 5331-01-206-8069, 5331-01-210-2836. Verify interchangeability with system specifications before substitution.
Key specifications for AMS-R-25988: Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Outside Diameter: 1.316 INCHES NOMINAL IN; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL; Elongation Percentage: 125 MAXIMUM. 6 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.