NSN 4820-01-107-2452 · NIIN 011072452 · Part number NS-3981ASSEMBLYB FIND2
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 15187
Government record, cited
NSN 4820-01-107-2452 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-107-2452. Manufacturer of record part number: NS-3981ASSEMBLYB FIND2.
Manufacturer of record: Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Identification
NSN: 4820-01-107-2452
NIIN: 011072452
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: NS-3981ASSEMBLYB FIND2
Manufacturer: Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
General Description
The Cap,valve, cataloged under National Stock Number 4820-01-107-2452, 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 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-107-2452
Primary Part Number
NS-3981ASSEMBLYB FIND2
Item Name
Cap,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Status
ACTIVE
Outside Diameter
4.110 INCHES NOMINAL IN
Valve Size for Which Designed
3.000 INCHES IN
Height
1.688 INCHES NOMINAL IN
Material
COPPER ALLOY
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.
4820-01-125-9747NS3981ASSYBPOSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-125-9993S90014POSSIBLE MATCH
PARTS KIT,CHECK VALVE
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-145-6249POSSIBLE MATCH
PARTS KIT,CHECK VALVE
Possible match (shared part number)
4820-01-146-7060NS-3981 ASSY B FIND18POSSIBLE MATCH
PARTS KIT,CHECK VALVE
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-191-8539NS-3981 ASSEMBLY E FIND 21POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
5340-01-210-4188POSSIBLE MATCH
COVER,ACCESS
Possible match (shared part number)
4820-01-210-4345NS-3981,ASSY B, FIND 1, PC1POSSIBLE MATCH
BODY,VALVE
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-217-470790034003POSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
Reference documents
Reference
Meaning
NS-3981ASSEMBLYB FIND2
5/9Secondary reference
National Oilwell
NS-3981
5/9Secondary reference
National Oilwell
NS-3981
D/9Drawing number reference only
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Related Parts
4820-01-125-9747POSSIBLE MATCH
VALVE,CHECK
NS3981ASSYB
4820-01-125-9993POSSIBLE MATCH
PARTS KIT,CHECK VALVE
S90014
4820-01-145-6249POSSIBLE MATCH
PARTS KIT,CHECK VALVE
4820-01-146-7060POSSIBLE MATCH
PARTS KIT,CHECK VALVE
NS-3981 ASSY B FIND18
4820-01-191-8539POSSIBLE MATCH
DISK,VALVE
NS-3981 ASSEMBLY E FIND 21
5340-01-210-4188POSSIBLE MATCH
COVER,ACCESS
4820-01-210-4345POSSIBLE MATCH
BODY,VALVE
NS-3981,ASSY B, FIND 1, PC1
4820-01-217-4707POSSIBLE MATCH
VALVE,CHECK
90034003
Frequently Asked Questions
What is NSN 4820-01-107-2452?
NSN 4820-01-107-2452 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 4820-01-107-2452?
NSN 4820-01-107-2452 has 1 manufacturer part number on file: NS-3981ASSEMBLYB FIND2 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
What NSN replaces 4820-01-107-2452?
8 possible matches (shared part number, not a government interchangeability claim): 4820-01-125-9747, 4820-01-125-9993, 4820-01-145-6249. Verify interchangeability with system specifications before substitution.
What are the specifications of NS-3981ASSEMBLYB FIND2?
Key specifications for NS-3981ASSEMBLYB FIND2: Outside Diameter: 4.110 INCHES NOMINAL IN; Valve Size for Which Designed: 3.000 INCHES IN; Height: 1.688 INCHES NOMINAL IN; Material: COPPER ALLOY. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-107-2452 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.