The O-Ring Set, cataloged under National Stock Number 5331-01-644-7901, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Dante Valve Company. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-644-7901 |
| Primary Part Number | D50-0063-SK |
| Item Name | O-Ring Set |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Dante Valve Company |
| Status | ACTIVE |
| Component Quantity | 8 |
| Document Type | PARTS LIST |
| Component Document Origin | INDUSTRIAL |
| End Item Name | RELIEF VALVE |
| Document Source | 5P967 |
| 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 |
|---|---|
| D50-0063-SK PRIMARY | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| D50-0063 REV NOTE 6 | C/1 Advisory reference — outside the item-of-supply concept Dante Valve Company |
NSN 5331-01-644-7901 is a O-Ring Set, manufactured by Dante Valve Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-644-7901 has 1 manufacturer part number on file: D50-0063-SK (Dante Valve Company).
Key specifications for D50-0063-SK: Component Quantity: 8; Document Type: PARTS LIST; Component Document Origin: INDUSTRIAL; End Item Name: RELIEF VALVE. 5 specifications are 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.