The Parts Kit,ball Valve, cataloged under National Stock Number 4820-01-145-4237, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-145-4237
Item Name
Parts Kit,ball Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Component Quantity
3
Supply Items and Quantities
BALL 1; SEAT 2
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 Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-146-4156SS845-2050967 PIECE 30POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)Naval Ship Systems Command
4820-01-159-29452640-405X3 PIECE27POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-164-71872640-405X3 PIECE 29POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-558-9637SS845-2050967 PIECE NO 75POSSIBLE MATCH
STRAP,RETAINING
Possible match (shared part number)Naval Ship Systems Command
5340-01-558-9642SS845-2050967 PIECE NO 77POSSIBLE MATCH
STRAP,RETAINING
Possible match (shared part number)Naval Ship Systems Command
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
2640-405X3
D/9Drawing number reference only
U.S. Government activity
SS845-2050967
D/9Drawing number reference only
U.S. Government activity
2640-405X3 PIECE 3,6
3/2Design control — primary reference
U.S. Government activity
SS845-2050967 PIECE 3,6
3/2Design control — primary reference
U.S. Government activity
Related Parts
4820-01-146-4156POSSIBLE MATCH
RETAINER,SEAT,VALVE
SS845-2050967 PIECE 30
4820-01-159-2945POSSIBLE MATCH
STEM,FLUID VALVE
2640-405X3 PIECE27
4820-01-164-7187POSSIBLE MATCH
RETAINER,SEAT,VALVE
2640-405X3 PIECE 29
5340-01-558-9637POSSIBLE MATCH
STRAP,RETAINING
SS845-2050967 PIECE NO 75
5340-01-558-9642POSSIBLE MATCH
STRAP,RETAINING
SS845-2050967 PIECE NO 77
Frequently Asked Questions
What is NSN 4820-01-145-4237?
NSN 4820-01-145-4237 is a Parts Kit,ball Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-145-4237?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-146-4156, 4820-01-159-2945, 4820-01-164-7187. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-145-4237?
Key specifications for 4820-01-145-4237: Component Quantity: 3; Supply Items and Quantities: BALL 1; SEAT 2. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-145-4237 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.