The O-Ring, cataloged under National Stock Number 5331-01-397-0829, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Dbr Industries, Inc. Dba Dbr Industries Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-397-0829 |
| Primary Part Number | M25988/2-908 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Dbr Industries, Inc. Dba Dbr Industries Inc |
| Status | ACTIVE |
| Temp Rating | -90.0 FAHRENHEIT AND 350.0 CELSIUS DEGC |
| Cross-Sectional Height | 0.084 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE |
| Color | BLUE |
| Center Hole Diameter | 0.635 INCHES MINIMUM AND 0.653 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 |
|---|---|
| M25988/2-908 | Dbr Industries, Inc. Dba Dbr Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| S8316ADB | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| S8316AD8 | C/1 Advisory reference — outside the item-of-supply concept Honeywell International Inc. Div Aerospace - Torrance |
| 5331PL0166456 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| S8316AD8 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| MIL-DTL-25988/2 | 4/1 Identification reference U.S. Government activity |
| MIL-R-25988 | 5/9 Secondary reference U.S. Government activity |
| M25988/2-908 | 2/2 Government specification standardization U.S. Government activity |
| S9412-558 | 5/9 Secondary reference U.S. Government activity |
| M25988/2-908 | 5/1 Secondary reference Kapco Valtec Dba Kapco Valtec |
| S9412-558 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
| 10159963 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5331-01-397-0829 is a O-Ring, manufactured by Dbr Industries, Inc. Dba Dbr Industries Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-397-0829 has 1 manufacturer part number on file: M25988/2-908 (Dbr Industries, Inc. Dba Dbr Industries Inc).
Key specifications for M25988/2-908: Temp Rating: -90.0 FAHRENHEIT AND 350.0 CELSIUS DEGC; Cross-Sectional Height: 0.084 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: MIL-R-25988 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.
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.