The Seat,valve, cataloged under National Stock Number 4820-01-477-1988, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is B N L Industries Inc. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-477-1988 |
| Primary Part Number | V24509-20-09 DET NO6 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | B N L Industries Inc |
| Status | ACTIVE |
| Body Outside Diameter | 2.000 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE OVERALL |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| V24509-20-09-06 | B N L Industries Inc (USA) |
| V24509-20-09 DET NO6 PRIMARY | B N L Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| V24509-20-09-6 | C/1 Advisory reference — outside the item-of-supply concept B N L Industries Inc |
| V24509-20-09 | D/9 Drawing number reference only B N L Industries Inc |
NSN 4820-01-477-1988 is a Seat,valve, manufactured by B N L Industries Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-477-1988 has 2 manufacturer part numbers on file: V24509-20-09-06 (B N L Industries Inc), V24509-20-09 DET NO6 (B N L Industries Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-477-1991. Verify interchangeability with system specifications before substitution.
Key specifications for V24509-20-09 DET NO6: Body Outside Diameter: 2.000 INCHES NOMINAL IN; Style Designator: PLAIN; End Item Identification: 90 DEG. 3 WAY BALL VALVE, 2IN P/N V24509-20-9 IN; Material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL. 4 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.