NSN 4820-01-421-2228 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-421-2228. Manufacturer of record part number: 211074851.
Nominal Pipe Size Accommodated: 1.500 INCHES ALL ENDS IN
1 manufacturer part number on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 4820-01-421-2228
NIIN: 014212228
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 211074851
Manufacturer: Naval Sea Systems Command
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-421-2228, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-421-2228
Primary Part Number
211074851
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Nominal Pipe Size Accommodated
1.500 INCHES ALL ENDS IN
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 Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
NSN 4820-01-421-2228 is a Valve,safety Relief, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-421-2228?
NSN 4820-01-421-2228 has 1 manufacturer part number on file: 211074851 (Naval Sea Systems Command).
What NSN replaces 4820-01-421-2228?
8 possible matches (shared part number, not a government interchangeability claim): 4820-01-443-2263, 4820-01-443-4815, 4820-01-443-4817. Verify interchangeability with system specifications before substitution.
What are the specifications of 211074851?
Key specifications for 211074851: Nominal Pipe Size Accommodated: 1.500 INCHES ALL ENDS IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-421-2228 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.