The O-Ring, cataloged under National Stock Number 5331-01-388-5665, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-388-5665 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | ACTIVE |
| Temp Rating | -15.0 CELSIUS AND 200.0 CELSIUS DEGC |
| Cross-Sectional Height | 1.70 MILLIMETERS MINIMUM AND 1.86 MILLIMETERS MAXIMUM MM |
| Hardness Rating | 76.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE MINIMUM AND 85.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE MAXIMUM |
| Center Hole Diameter | 28.05 MILLIMETERS MINIMUM AND 28.55 MILLIMETERS MAXIMUM MM |
| Material | RUBBER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 442-154 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-01-388-5665 is a O-Ring, classified under FSC 5331, O-ring. Status: active.
Key specifications for 5331-01-388-5665: Temp Rating: -15.0 CELSIUS AND 200.0 CELSIUS DEGC; Cross-Sectional Height: 1.70 MILLIMETERS MINIMUM AND 1.86 MILLIMETERS MAXIMUM MM; Hardness Rating: 76.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE MINIMUM AND 85.0 INTERNATIONAL RUBBER HARDNESS DEGREE SCALE MAXIMUM; Special Features: FLUORINATED HYDROCARBON POLYMER. 5 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.