The Seat,valve, cataloged under National Stock Number 4820-00-755-7089, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tyco Fire Products Lp. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-755-7089 |
| Primary Part Number | 20-02461 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tyco Fire Products Lp |
| Status | ACTIVE |
| Body Outside Diameter | 2.686 INCHES MINIMUM AND 2.692 INCHES MAXIMUM IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 1.875 INCHES NOMINAL IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE OVERALL |
| Seat Angle in Deg | 30.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 20-02461 PRIMARY | Tyco Fire Products Lp (USA) |
| Reference | Meaning |
|---|---|
| V2461 | 5/9 Secondary reference Tyco Fire Products Lp |
NSN 4820-00-755-7089 is a Seat,valve, manufactured by Tyco Fire Products Lp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-755-7089 has 1 manufacturer part number on file: 20-02461 (Tyco Fire Products Lp).
2 possible matches (shared part number, not a government interchangeability claim): 5999-01-186-9714, 5340-01-557-0756. Verify interchangeability with system specifications before substitution.
Key specifications for 20-02461: Overall Height: 0.359 INCHES NOMINAL IN; Body Outside Diameter: 2.686 INCHES MINIMUM AND 2.692 INCHES MAXIMUM IN; Style Designator: PLAIN; Body Inside Diameter: 1.875 INCHES NOMINAL IN. 6 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.