NSN 4820-01-409-1753 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-409-1753. Manufacturer of record part number: R522H-4.
The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-409-1753, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fisher Controls Co Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
C/1Advisory reference — outside the item-of-supply concept
Fisher Controls Co Inc
R522H
5/9Secondary reference
Fisher Controls Co Inc
R922-27
5/9Secondary reference
Fisher Controls Co Inc
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-409-1753?
NSN 4820-01-409-1753 is a Valve,regulating,fluid Pressure, manufactured by Fisher Controls Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-409-1753?
NSN 4820-01-409-1753 has 1 manufacturer part number on file: R522H-4 (Fisher Controls Co Inc).
What are the specifications of R522H-4?
Key specifications for R522H-4: Special Features: 1 1/2 TO 2 1/2 SPRING PRESSURE. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-409-1753 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.