The O-Ring, cataloged under National Stock Number 5331-01-444-8397, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Macgregor Sweden Ab. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Macgregor Sweden Ab (CAGE A236N) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-444-8397 |
| Primary Part Number | RM4487 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Macgregor 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 |
|---|---|
| RM4487 PRIMARY | Macgregor Sweden Ab (SWE) |
| 21-10935 ITEM 29 | Macgregor Sweden Ab (SWE) |
| Reference | Meaning |
|---|---|
| RM4487 | 3/9 Design control — primary reference Macgregor Sweden Ab |
| 21-10935 ITEM 29 | 5/9 Secondary reference Macgregor Sweden Ab |
NSN 5331-01-444-8397 is a O-Ring, manufactured by Macgregor Sweden Ab, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-444-8397 has 2 manufacturer part numbers on file: RM4487 (Macgregor Sweden Ab), 21-10935 ITEM 29 (Macgregor 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.