NSN 4820-00-220-3274 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-220-3274. Manufacturer of record part number: 1632.
The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-00-220-3274, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Pneudraulics, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Valve,relief,pressure and Temper
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Manufacturers
Pneudraulics, Inc. (CAGE 06177)
Technical Specifications
Parameter
Value
NSN
4820-00-220-3274
Primary Part Number
1632
Item Name
Valve,relief,pressure and Temper
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Pneudraulics, Inc.
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5975-00-396-2255POSSIBLE MATCH
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5930-00-444-9544POSSIBLE MATCH
SWITCH,TOGGLE
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5950-00-628-7584SMB318970POSSIBLE MATCH
REACTOR
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4730-00-695-0095609941POSSIBLE MATCH
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6250-00-922-906957-41POSSIBLE MATCH
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5961-01-216-7192POSSIBLE MATCH
SEMICONDUCTOR DEVICE,DIODE
Possible match (shared part number)
5340-01-315-7188POSSIBLE MATCH
BRACKET,MOUNTING
Possible match (shared part number)
5340-01-441-97867010396 PC 42POSSIBLE MATCH
DOORSTOP
Possible match (shared part number)Naval Sea Systems Command
5940-01-725-28095741POSSIBLE MATCH
ADAPTER,RADIO FREQUENCY CABLE
Possible match (shared part number)Pomona Electronics
NSN 4820-00-220-3274 is a Valve,relief,pressure and Temper, manufactured by Pneudraulics, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-220-3274?
NSN 4820-00-220-3274 has 1 manufacturer part number on file: 1632 (Pneudraulics, Inc.).
What NSN replaces 4820-00-220-3274?
9 possible matches (shared part number, not a government interchangeability claim): 5975-00-396-2255, 5930-00-444-9544, 5950-00-628-7584. Verify interchangeability with system specifications before substitution.
Is NSN 4820-00-220-3274 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.