The O-Ring Set, cataloged under National Stock Number 5331-01-588-8666, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Dante Valve Company. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | O-Ring Set |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Dante Valve Company (CAGE 5P967) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-588-8666 |
| Primary Part Number | D50-0037-SK |
| Item Name | O-Ring Set |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Dante Valve Company |
| 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 |
|---|---|
| D50-0037-SK PRIMARY | Dante Valve Company (USA) |
| D50-0037 NOTE 6 | Dante Valve Company (USA) |
| D50-0037 ITEMS 3,7,14,20,28 | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| D50-0037 ITEMS 3,7,14,20,28 | 5/9 Secondary reference Danco Valve Company |
| D50-0037 | D/9 Drawing number reference only Danco Valve Company |
| D50-0037-SK | 3/9 Design control — primary reference Danco Valve Company |
| D50-0037 NOTE 6 | 5/9 Secondary reference Danco Valve Company |
NSN 5331-01-588-8666 is a O-Ring Set, manufactured by Dante Valve Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-588-8666 has 3 manufacturer part numbers on file: D50-0037-SK (Dante Valve Company), D50-0037 NOTE 6 (Dante Valve Company), D50-0037 ITEMS 3,7,14,20,28 (Dante Valve Company).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-588-8668. Verify interchangeability with system specifications before substitution.
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.