The O-Ring, cataloged under National Stock Number 5331-01-397-8780, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is John Crane, Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | John Crane, Inc (CAGE 71724) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-397-8780 |
| Primary Part Number | C1065-1-3/4 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | John Crane, Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| C1065-1-3/4 PRIMARY | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| C1065 1 3/4 X 1 1/4 X 1/4 | 5/9 Secondary reference John Crane, Inc |
| C1065 1 3/4 X 1 1/4 X 1/4 | 3/9 Design control — primary reference Wartsila Lips Inc |
NSN 5331-01-397-8780 is a O-Ring, manufactured by John Crane, Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-397-8780 has 1 manufacturer part number on file: C1065-1-3/4 (John Crane, Inc).
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.