The O-Ring, cataloged under National Stock Number 5331-01-566-5646, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corp Div O-Ring Division. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Parker-Hannifin Corp Div O-Ring Division (CAGE 02697); Nd Defense Llc (CAGE 338X5) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-566-5646 |
| Primary Part Number | M33 ISO O-RING |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| 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 |
|---|---|
| M33 ISO O-RING PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 1841847C1 | Nd Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| EMD-1484 | D/9 Drawing number reference only Nd Defense Llc |
NSN 5331-01-566-5646 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-566-5646 has 2 manufacturer part numbers on file: M33 ISO O-RING (Parker-Hannifin Corp Div O-Ring Division), 1841847C1 (Nd Defense Llc).
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.