The Seat,valve, cataloged under National Stock Number 4820-00-509-6330, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 9 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-509-6330 |
| Primary Part Number | 63486 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Taper Minor Diameter | 0.874 INCHES MINIMUM AND 0.876 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-R-17131,TYPE MIL-RCOCR-A MIL SPEC SINGLE MATERIAL RESPONSE FACE |
| Material Document and Classification | QQ-S-763,CLASS 416 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Taper Major Diameter | 1.274 INCHES NOMINAL IN |
| Taper Length | 2.016 INCHES NOMINAL IN |
| Seat Radius | 0.219 INCHES NOMINAL IN |
| Material | STEEL BODY |
| Material | COBALT ALLOY FACE |
| 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 |
|---|---|
| 63486 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| LB63486 | 5/9 Secondary reference U.S. Government activity |
| 63486 001 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| LH63609PC4-4 | 5/9 Secondary reference U.S. Government activity |
| LB63486 | 5/9 Secondary reference U.S. Government activity |
| 63486 | 5/9 Secondary reference U.S. Government activity |
| 63486 001 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| LH63609PC4-4 | 5/9 Secondary reference U.S. Government activity |
| 63486 | 5/9 Secondary reference U.S. Government activity |
| 3211843 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-509-6330 is a Seat,valve, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-509-6330 has 1 manufacturer part number on file: 63486 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
1 possible match (shared part number, not a government interchangeability claim): 2815-01-204-1231. Verify interchangeability with system specifications before substitution.
Key specifications for 63486: Taper Minor Diameter: 0.874 INCHES MINIMUM AND 0.876 INCHES MAXIMUM IN; Material Document and Classification: MIL-R-17131,TYPE MIL-RCOCR-A MIL SPEC SINGLE MATERIAL RESPONSE FACE; Material Document and Classification: QQ-S-763,CLASS 416 FED SPEC SINGLE MATERIAL RESPONSE BODY; Taper Major Diameter: 1.274 INCHES NOMINAL IN. 9 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.