The Seat,valve, cataloged under National Stock Number 4820-00-148-5553, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. Government technical data includes 7 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through both NSN and commercial part number lookups. 17 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-148-5553 |
| Primary Part Number | 3107N |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.125 INCHES NOMINAL IN |
| Flange Diameter | 3.938 INCHES NOMINAL IN |
| Body Outside Diameter | 3.094 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Under Flange Height | 0.406 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY OVERALL |
| Seating Surface Shape | FLAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3107N PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| HL6022PC118 | 5/9 Secondary reference U.S. Government activity |
| HL4043PC128 | 5/9 Secondary reference U.S. Government activity |
| HL6017PC118 | 5/9 Secondary reference U.S. Government activity |
| HL4056PC128 | 5/9 Secondary reference U.S. Government activity |
| HL4042PC128 | 5/9 Secondary reference U.S. Government activity |
| 3107N | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| HL4057PC128 | 5/9 Secondary reference U.S. Government activity |
| 110959PC128 | 5/9 Secondary reference U.S. Government activity |
| 110953PC128 | 5/9 Secondary reference U.S. Government activity |
| HL6032PC118 | 5/9 Secondary reference U.S. Government activity |
| 110967PC128 | 5/9 Secondary reference U.S. Government activity |
| HL6033PC118 | 5/9 Secondary reference U.S. Government activity |
| HL4049PC128 | 5/9 Secondary reference U.S. Government activity |
| 3107N | 5/9 Secondary reference U.S. Government activity |
| HL6016PC118 | 5/9 Secondary reference U.S. Government activity |
| 110952PC128 | 5/9 Secondary reference U.S. Government activity |
| 3107N | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
NSN 4820-00-148-5553 is a Seat,valve, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-148-5553 has 1 manufacturer part number on file: 3107N (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
Key specifications for 3107N: Flange Seat to Disk End Height: 0.125 INCHES NOMINAL IN; Flange Diameter: 3.938 INCHES NOMINAL IN; Body Outside Diameter: 3.094 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 7 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.
NSN 4820-00-148-5553 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.