The O-Ring, cataloged under National Stock Number 5331-01-351-2739, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Oshkosh Defense Llc (CAGE 75Q65); Navantia Sa Sme. Div Navantia Hq (CAGE 0141B); Navantia - Propulsion Y Energia Motores - Cartagena (CAGE 409BB); Caterpillar Inc Div Caterpillar Defense (CAGE 11083) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-351-2739 |
| Primary Part Number | 8C5230 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| 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 |
|---|---|
| 7HB473 | Oshkosh Defense Llc (USA) |
| 8C-5230 | Navantia Sa Sme. Div Navantia Hq (ESP) |
| 8C-5230 | Navantia - Propulsion Y Energia Motores - Cartagena (ESP) |
| 9Y6915 ITEM 11 | Caterpillar Inc Div Caterpillar Defense (USA) |
| 8C5230 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 7HB473 | 5/9 Secondary reference Oshkosh Corp |
| 10076639 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5331-01-351-2739 is a O-Ring, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-351-2739 has 5 manufacturer part numbers on file: 7HB473 (Oshkosh Defense Llc), 8C-5230 (Navantia Sa Sme. Div Navantia Hq), 8C-5230 (Navantia - Propulsion Y Energia Motores - Cartagena), 9Y6915 ITEM 11 (Caterpillar Inc Div Caterpillar Defense), 8C5230 (Caterpillar Inc Div Caterpillar Defense).
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.