NSN 4820-01-057-9524 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-057-9524. Manufacturer of record part number: 845-4558740 ITEM152.
General Characteristics Item Description: STEEL;4.500 IN. SQ;0.750 IN. THK;4 HOLES 0.781 IN. DIA;2 HOLES 0.656 IN. DIA;2 HOLES 0.406 IN. DIA;1.375 IN. ID 12 UNF-2B THD,1/2 IN. DEEP IN
1 manufacturer part number on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 4820-01-057-9524
NIIN: 010579524
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 845-4558740 ITEM152
Manufacturer: Naval Sea Systems Command
General Description
The Flange,jacking,valve, cataloged under National Stock Number 4820-01-057-9524, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-057-9524
Primary Part Number
845-4558740 ITEM152
Item Name
Flange,jacking,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
General Characteristics Item Description
STEEL;4.500 IN. SQ;0.750 IN. THK;4 HOLES 0.781 IN. DIA;2 HOLES 0.656 IN. DIA;2 HOLES 0.406 IN. DIA;1.375 IN. ID 12 UNF-2B THD,1/2 IN. DEEP 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 Items10
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
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
4820-01-124-27882641-809-42 ITEM 80POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
C/1Advisory reference — outside the item-of-supply concept
U.S. Government activity
Related Parts
4820-01-059-0708POSSIBLE MATCH
PARTS KIT,BALL VALVE
2641-806-42PC3,2640-801X02PC3
4820-01-062-1351POSSIBLE MATCH
ADAPTER,STOP WRENCH
2641-809-42 ITEM 103
4820-01-063-0359POSSIBLE MATCH
PARTS KIT,BALL VALVE
2641-809-42IT10X2640-801X02PC3
4820-01-063-4872POSSIBLE MATCH
PARTS KIT,BALL VALVE
4820-01-085-1877POSSIBLE MATCH
STEM,FLUID VALVE
2641-809-42 ITEM 68
4820-01-093-7395POSSIBLE MATCH
STEM,FLUID VALVE
2641-809-42 ITEM 34
4820-01-105-0002POSSIBLE MATCH
DISK,VALVE
2641-809-42 ITEM 82
4820-01-115-0971POSSIBLE MATCH
DISK,VALVE
2641-809-42 ITEM 84
4820-01-115-1013POSSIBLE MATCH
STEM,FLUID VALVE
2641-809-42 ITEM 78
4820-01-124-2788POSSIBLE MATCH
DISK,VALVE
2641-809-42 ITEM 80
Frequently Asked Questions
What is NSN 4820-01-057-9524?
NSN 4820-01-057-9524 is a Flange,jacking,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-057-9524?
NSN 4820-01-057-9524 has 1 manufacturer part number on file: 845-4558740 ITEM152 (Naval Sea Systems Command).
What NSN replaces 4820-01-057-9524?
10 possible matches (shared part number, not a government interchangeability claim): 4820-01-059-0708, 4820-01-062-1351, 4820-01-063-0359. Verify interchangeability with system specifications before substitution.
What are the specifications of 845-4558740 ITEM152?
Key specifications for 845-4558740 ITEM152: General Characteristics Item Description: STEEL;4.500 IN. SQ;0.750 IN. THK;4 HOLES 0.781 IN. DIA;2 HOLES 0.656 IN. DIA;2 HOLES 0.406 IN. DIA;1.375 IN. ID 12 UNF-2B THD,1/2 IN. DEEP IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-057-9524 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.