The O-Ring, cataloged under National Stock Number 5331-01-437-4604, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Kongsberg Maritime Sweden Ab. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Kongsberg Maritime Sweden Ab (CAGE A208N) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-437-4604 |
| Primary Part Number | 971820 ITEM 13 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Kongsberg Maritime Sweden Ab |
| 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 |
|---|---|
| 971820 ITEM 13 PRIMARY | Kongsberg Maritime Sweden Ab (SWE) |
| Reference | Meaning |
|---|---|
| 971820 ITEM 13 | 3/9 Design control — primary reference Kamewa |
| 551586 | 5/9 Secondary reference Kamewa |
| 971820 ITEM 13 | 5/9 Secondary reference Rolls-Royce Ab |
NSN 5331-01-437-4604 is a O-Ring, manufactured by Kongsberg Maritime Sweden Ab, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-437-4604 has 1 manufacturer part number on file: 971820 ITEM 13 (Kongsberg Maritime Sweden Ab).
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.