NSN 4820-00-868-2974 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-868-2974. Manufacturer of record part number: 205120PC2.
Manufacturer: Huntington Ingalls Inc Div Newport News Shipbuilding
General Description
The Ball,valve,ported, cataloged under National Stock Number 4820-00-868-2974, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
4820-00-868-2974
Primary Part Number
205120PC2
Item Name
Ball,valve,ported
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Huntington Ingalls Inc Div Newport News Shipbuilding
Status
ACTIVE
Port Diameter
1.000 INCHES NOMINAL IN
Spherical Diameter
1.745 INCHES MINIMUM AND 1.748 INCHES MAXIMUM IN
Port Configuration
STRAIGHT
Stem Accommodation Quantity
1
Port Quantity
2
Surface Treatment
PLASTIC POLYTETRAFLUOROETHYLENE
Material
STEEL STAINLESS - USE STB000
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 Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-134-36842640-405X3 PIECE 26POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-141-63032640-405X3 PIECE1,4POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-141-89442640-405X3 PIECE 28POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-145-42372640-405X3 PIECE 3,6POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-146-4156SS845-2050967 PIECE 30POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)Naval Ship Systems Command
4820-01-164-71872640-405X3 PIECE 29POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
Reference documents
Reference
Meaning
2640-405X3
D/9Drawing number reference only
U.S. Government activity
2640-405X3PC2
5/2Secondary reference
U.S. Government activity
Related Parts
4820-01-134-3684POSSIBLE MATCH
STEM,FLUID VALVE
2640-405X3 PIECE 26
4820-01-141-6303POSSIBLE MATCH
PARTS KIT,BALL VALVE
2640-405X3 PIECE1,4
4820-01-141-8944POSSIBLE MATCH
STEM,FLUID VALVE
2640-405X3 PIECE 28
4820-01-145-4237POSSIBLE MATCH
PARTS KIT,BALL VALVE
2640-405X3 PIECE 3,6
4820-01-146-4156POSSIBLE MATCH
RETAINER,SEAT,VALVE
SS845-2050967 PIECE 30
4820-01-164-7187POSSIBLE MATCH
RETAINER,SEAT,VALVE
2640-405X3 PIECE 29
Frequently Asked Questions
What is NSN 4820-00-868-2974?
NSN 4820-00-868-2974 is a Ball,valve,ported, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-868-2974?
NSN 4820-00-868-2974 has 1 manufacturer part number on file: 205120PC2 (Huntington Ingalls Inc Div Newport News Shipbuilding).
What NSN replaces 4820-00-868-2974?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-134-3684, 4820-01-141-6303, 4820-01-141-8944. Verify interchangeability with system specifications before substitution.
What are the specifications of 205120PC2?
Key specifications for 205120PC2: Port Diameter: 1.000 INCHES NOMINAL IN; Spherical Diameter: 1.745 INCHES MINIMUM AND 1.748 INCHES MAXIMUM IN; Port Configuration: STRAIGHT; Stem Accommodation Quantity: 1. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-868-2974 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.