NSN 4820-01-057-7444 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-057-7444. Manufacturer of record part number: 845-4558743ITEM53.
General Characteristics Item Description: CRES;2.000 IN. LG;1.250 IN. H;0.850 IN. W IN
1 manufacturer part number on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 4820-01-057-7444
NIIN: 010577444
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 845-4558743ITEM53
Manufacturer: Naval Sea Systems Command
General Description
The Adapter,stop,valve, cataloged under National Stock Number 4820-01-057-7444, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-057-7444
Primary Part Number
845-4558743ITEM53
Item Name
Adapter,stop,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
General Characteristics Item Description
CRES;2.000 IN. LG;1.250 IN. H;0.850 IN. W 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 Items11
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-057-95242641-809-42 ITEM 9POSSIBLE MATCH
FLANGE,JACKING,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-059-07082641-806-42PC3,2640-801X02PC3POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-062-13512641-809-42 ITEM 103POSSIBLE MATCH
ADAPTER,STOP WRENCH
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-063-03592641-809-42IT10X2640-801X02PC3POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-063-4872POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)
4820-01-085-18772641-809-42 ITEM 68POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-093-73952641-809-42 ITEM 34POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-105-00022641-809-42 ITEM 82POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-115-09712641-809-42 ITEM 84POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-115-10132641-809-42 ITEM 78POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
NSN 4820-01-057-7444 is a Adapter,stop,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-057-7444?
NSN 4820-01-057-7444 has 1 manufacturer part number on file: 845-4558743ITEM53 (Naval Sea Systems Command).
What NSN replaces 4820-01-057-7444?
11 possible matches (shared part number, not a government interchangeability claim): 4820-01-057-9524, 4820-01-059-0708, 4820-01-062-1351. Verify interchangeability with system specifications before substitution.
What are the specifications of 845-4558743ITEM53?
Key specifications for 845-4558743ITEM53: General Characteristics Item Description: CRES;2.000 IN. LG;1.250 IN. H;0.850 IN. W IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-057-7444 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.