The O-Ring Set, cataloged under National Stock Number 5331-01-580-7690, 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 3 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5331-01-580-7690 |
| Primary Part Number | B4031-LS |
| Item Name | O-Ring Set |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Dante Valve Company |
| Status | ACTIVE |
| Component Quantity | 7 |
| End Item Name | VALVE,ANGLE RELIEF |
| Nonsupply Items and Quantities | M83248/2 (FLUOROCARBON,90 DUROMETER) AS568A DASH NUMBER O-RINGS; 2-350 1,2-262 1,2-228 1,3-908 1,2-013 1,3-920 1,2-112 1 |
| 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 |
|---|---|
| B4031-LS PRIMARY | Dante Valve Company (USA) |
| D50-0002 NOTE 6 | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| B4031-LS | 3/9 Design control — primary reference Danco Valve Company |
| D50-0002 NOTE 6 | 5/9 Secondary reference Danco Valve Company |
NSN 5331-01-580-7690 is a O-Ring Set, manufactured by Dante Valve Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-580-7690 has 2 manufacturer part numbers on file: B4031-LS (Dante Valve Company), D50-0002 NOTE 6 (Dante Valve Company).
Key specifications for B4031-LS: Component Quantity: 7; End Item Name: VALVE,ANGLE RELIEF; Nonsupply Items and Quantities: M83248/2 (FLUOROCARBON,90 DUROMETER) AS568A DASH NUMBER O-RINGS; 2-350 1,2-262 1,2-228 1,3-908 1,2-013 1,3-920 1,2-112 1; Special Features: MIL SPEC P/N FORMAT M83248/2-XXX (LAST 3 DIGITS OF AS568A DASH NUMBER). 3 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.