The O-Ring, cataloged under National Stock Number 5331-01-531-2390, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Bourns Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-531-2390 |
| Primary Part Number | 13278 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Bourns Inc |
| Status | ACTIVE |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| 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 |
|---|---|
| 13278 PRIMARY | Bourns Inc (USA) |
| Reference | Meaning |
|---|---|
| 13278 | 3/9 Design control — primary reference Cat Pumps Corp |
NSN 5331-01-531-2390 is a O-Ring, manufactured by Bourns Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-531-2390 has 1 manufacturer part number on file: 13278 (Bourns Inc).
Key specifications for 13278: Part Name Assigned by Controlling Agency: O-RING SEAT; End Item Identification: CAT PUMPS MODELS 6760,6761,6762,6767; Material: RUBBER FLUOROCARBON CLASS FPM. 1 specification is 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.