The O-Ring, cataloged under National Stock Number 5331-01-011-9657, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Cooper Crouse-Hinds Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-011-9657 |
| Primary Part Number | 20400-2 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Cooper Crouse-Hinds Llc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Center Hole Diameter | 6.211 INCHES MINIMUM AND 6.257 INCHES MAXIMUM IN |
| Material | RUBBER SILICONE CLASS Q |
| 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 |
|---|---|
| 20400-2 PRIMARY | Cooper Crouse-Hinds Llc (USA) |
| Reference | Meaning |
|---|---|
| 20400 | 5/9 Secondary reference Cooper Crouse-Hinds Llc |
| 37621-259 | 5/9 Secondary reference Cooper Crouse-Hinds Llc |
NSN 5331-01-011-9657 is a O-Ring, manufactured by Cooper Crouse-Hinds Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-011-9657 has 1 manufacturer part number on file: 20400-2 (Cooper Crouse-Hinds Llc).
Key specifications for 20400-2: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Center Hole Diameter: 6.211 INCHES MINIMUM AND 6.257 INCHES MAXIMUM IN; Material: RUBBER SILICONE CLASS Q. 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.
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.