The O-Ring, cataloged under National Stock Number 5331-01-520-6142, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Textron Aviation Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-520-6142 |
| Primary Part Number | S3278C4 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Textron Aviation Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| S3278C4 PRIMARY | Textron Aviation Inc (USA) |
| Reference | Meaning |
|---|---|
| S3278C4 | 3/9 Design control — primary reference Cessna Aircraft Company Dba Textron Aviation |
NSN 5331-01-520-6142 is a O-Ring, manufactured by Textron Aviation Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-520-6142 has 1 manufacturer part number on file: S3278C4 (Textron Aviation Inc).
Key specifications for S3278C4: Part Name Assigned by Controlling Agency: SEAL RING; End Item Identification: ATR20 CESSNA ENGINE. 0 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.