The Seat,valve, cataloged under National Stock Number 4820-00-445-2302, 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 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-445-2302 |
| Primary Part Number | 20-03435 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tyco Fire Products Lp |
| Status | ACTIVE |
| Body Outside Diameter | 2.243 INCHES MINIMUM AND 2.248 INCHES MAXIMUM IN |
| Taper Minor Diameter | 1.635 INCHES MINIMUM AND 1.645 INCHES MAXIMUM IN |
| Style Designator | PLAIN |
| Taper Major Diameter | 2.031 INCHES NOMINAL IN |
| Body Inside Diameter | 1.495 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN |
| Material | PLASTIC POLYAMIDE NYLON 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 |
|---|---|
| 20-03435 PRIMARY | Tyco Fire Products Lp (USA) |
| Reference | Meaning |
|---|---|
| V3435 | 5/9 Secondary reference Tyco Fire Products Lp |
| V3279PC4 | D/9 Drawing number reference only Tyco Fire Products Lp |
NSN 4820-00-445-2302 is a Seat,valve, manufactured by Tyco Fire Products Lp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-445-2302 has 1 manufacturer part number on file: 20-03435 (Tyco Fire Products Lp).
Key specifications for 20-03435: Overall Height: 0.312 INCHES NOMINAL IN; Body Outside Diameter: 2.243 INCHES MINIMUM AND 2.248 INCHES MAXIMUM IN; Taper Minor Diameter: 1.635 INCHES MINIMUM AND 1.645 INCHES MAXIMUM IN; Style Designator: PLAIN. 8 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.