The Limiter,pressure, cataloged under National Stock Number 4820-01-020-5504, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-020-5504 |
| Primary Part Number | MODEL63BUWITHNOSPRING |
| Item Name | Limiter,pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives |
| Status | ACTIVE |
| General Characteristics Item Description | SUPPLY PRESSURE,0.800 IN. HG TO 130.000 PSIG IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATE D BY DWG REF |
| 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 |
|---|---|
| MODEL63BUWITHNOSPRING | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA) |
| Reference | Meaning |
|---|---|
| 54494-90044-1 | 1/3 Source control — Government-approved source U.S. Government activity |
NSN 4820-01-020-5504 is a Limiter,pressure, manufactured by Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-020-5504 has 1 manufacturer part number on file: MODEL63BUWITHNOSPRING (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives).
Key specifications for MODEL63BUWITHNOSPRING: General Characteristics Item Description: SUPPLY PRESSURE,0.800 IN. HG TO 130.000 PSIG IN; End Item Identification: AIR DATA COMPUTER,MODEL AN/ASM-442; Reference Number Differentiating Characteristics: AS DIFFERENTIATE D BY DWG REF. 2 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.