The Seat,valve, cataloged under National Stock Number 4820-00-146-4564, 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 1 specification, 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through both NSN and commercial part number lookups. 49 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-146-4564 |
| Primary Part Number | SET53 |
| 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 |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| SET53 | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| SET53 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| HL3831PC25 | 5/9 Secondary reference U.S. Government activity |
| SET53 | 5/9 Secondary reference U.S. Government activity |
| 87760PC48 | 5/9 Secondary reference U.S. Government activity |
| HL-5189 | D/9 Drawing number reference only U.S. Government activity |
| HL5189PC48 | 5/9 Secondary reference U.S. Government activity |
| HL1854PC48 | 5/9 Secondary reference U.S. Government activity |
| HL6074PC25 | 5/9 Secondary reference U.S. Government activity |
| SET53 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| HL4714PC25 | 5/9 Secondary reference U.S. Government activity |
| 2038N | 5/9 Secondary reference U.S. Government activity |
| 87765-1PC48 | 5/9 Secondary reference U.S. Government activity |
| HL4875PC25 | 5/9 Secondary reference U.S. Government activity |
| HL1859PC48 | 5/9 Secondary reference U.S. Government activity |
| HL5523PC25 | 5/9 Secondary reference U.S. Government activity |
| ARS5S49-52PC25 | 5/9 Secondary reference U.S. Government activity |
| HL3705PC48 | 5/9 Secondary reference U.S. Government activity |
| HL3839PC25 | 5/9 Secondary reference U.S. Government activity |
| HL5194PC48 | 5/9 Secondary reference U.S. Government activity |
| HL7109PC25 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-146-4564 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 4820-00-146-4564 has 1 manufacturer part number on file: SET53 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
3 possible matches (shared part number, not a government interchangeability claim): 4320-00-167-9751, 4310-00-346-9186, 5320-00-873-6343. Verify interchangeability with system specifications before substitution.
Key specifications for SET53: End Item Identification: WORTHINGTON PUMP MACHINERY AIR COMPRESSOR L.P.; Material: COPPER ALLOY OVERALL. 1 specification is 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.