NSN 4820-01-421-5273 · NIIN 014215273 · Part number B07537.003.256
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 15187
Government record, cited
NSN 4820-01-421-5273 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-421-5273. Manufacturer of record part number: B07537.003.256.
Valve Model Number for Which Designed: TYPE 1771-T
Valve Size for Which Designed: 2.000 INCHES IN
Material: COPPER ALLOY
Attachment Method: BOLTS
2 manufacturer part numbers on file
Manufacturer of record: Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Identification
NSN: 4820-01-421-5273
NIIN: 014215273
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: B07537.003.256
Manufacturer: Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
General Description
The Cap,valve, cataloged under National Stock Number 4820-01-421-5273, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-421-5273
Primary Part Number
B07537.003.256
Item Name
Cap,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Status
ACTIVE
Valve Type for Which Designed
RELIEF
Valve Model Number for Which Designed
TYPE 1771-T
Valve Size for Which Designed
2.000 INCHES IN
Material
COPPER ALLOY
Attachment Method
BOLTS
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 4820-01-421-5273 is a Cap,valve, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-421-5273?
NSN 4820-01-421-5273 has 2 manufacturer part numbers on file: B07537.003.256 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), SW144-2 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
What NSN replaces 4820-01-421-5273?
8 possible matches (shared part number, not a government interchangeability claim): 4820-01-421-5276, 4820-01-451-0720, 4820-01-487-0393. Verify interchangeability with system specifications before substitution.
What are the specifications of B07537.003.256?
Key specifications for B07537.003.256: Valve Type for Which Designed: RELIEF; Valve Model Number for Which Designed: TYPE 1771-T; Valve Size for Which Designed: 2.000 INCHES IN; End Item Identification: SEAWOLF CLASS SSN. 5 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-421-5273 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.