The O-Ring, cataloged under National Stock Number 5331-01-566-6597, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Legacy Fcs. Government technical data includes 3 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-566-6597 |
| Primary Part Number | M25988/2-272 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | The Boeing Company Div Legacy Fcs |
| Status | ACTIVE |
| Hardness Rating | 50.0 SHORE DUROMETER A NOMINAL |
| Color | BLUE |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| M25988/2-272 PRIMARY | The Boeing Company Div Legacy Fcs (USA) |
NSN 5331-01-566-6597 is a O-Ring, manufactured by The Boeing Company Div Legacy Fcs, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-566-6597 has 1 manufacturer part number on file: M25988/2-272 (The Boeing Company Div Legacy Fcs).
Key specifications for M25988/2-272: Hardness Rating: 50.0 SHORE DUROMETER A NOMINAL; Color: BLUE; Special Features: OIL AND FUEL RESISTANT; Part Name Assigned by Controlling Agency: O-RING. 3 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 5331-01-566-6597 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.