NSN 4820-01-124-6679 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-124-6679. Manufacturer of record part number: 255751ASSYJ.
Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS
Style Designator: STRAIGHT THRU
Nominal Outside Diameter Tube Accommodated: 0.375 INCHES ALL ENDS IN
Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Media for Which Designed: WATER-OIL-GAS SINGLE RESPONSE
Material: STEEL OVERALL
Identification
NSN: 4820-01-124-6679
NIIN: 011246679
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 255751ASSYJ
Manufacturer: Hunt Valve Company, Inc.
General Description
The Valve,ball, cataloged under National Stock Number 4820-01-124-6679, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-124-6679
Primary Part Number
255751ASSYJ
Item Name
Valve,ball
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Hunt Valve Company, Inc.
Status
ACTIVE
Connection Style
SOCKET (TUBE) ALL ENDS
Connection Type
UNTHREADED INTERNAL TUBE ALL ENDS
Style Designator
STRAIGHT THRU
Nominal Outside Diameter Tube Accommodated
0.375 INCHES ALL ENDS IN
Operating Pressure
3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Media for Which Designed
WATER-OIL-GAS SINGLE RESPONSE
Material
STEEL OVERALL
Valve Operation Method
MANUAL
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.
4820-01-124-6680255751ASSYBPOSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
4820-01-157-4304255751PCAY-APOSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
4820-01-216-7664255751 ASSEMBLY L 1-1/2INPOSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
4820-01-217-0162255751 PIECE 39POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
4820-01-222-0256255753 PIECE 15POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Huntington Ingalls Inc Div Newport News Shipbuilding
Huntington Ingalls Inc Div Newport News Shipbuilding
255751
D/9Drawing number reference only
Huntington Ingalls Inc Div Newport News Shipbuilding
255751ASSYJ
5/9Secondary reference
C M Industries Inc Dba Custom Marine Sales
Related Parts
4820-01-124-6680POSSIBLE MATCH
VALVE,BALL
255751ASSYB
4820-01-157-4304POSSIBLE MATCH
VALVE,BALL
255751PCAY-A
4820-01-216-7664POSSIBLE MATCH
VALVE,BALL
255751 ASSEMBLY L 1-1/2IN
4820-01-217-0162POSSIBLE MATCH
STEM,FLUID VALVE
255751 PIECE 39
4820-01-222-0256POSSIBLE MATCH
SEAT,VALVE
255753 PIECE 15
4820-01-421-2768POSSIBLE MATCH
VALVE,BALL
Frequently Asked Questions
What is NSN 4820-01-124-6679?
NSN 4820-01-124-6679 is a Valve,ball, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-124-6679?
NSN 4820-01-124-6679 has 1 manufacturer part number on file: 255751ASSYJ (Hunt Valve Company, Inc.).
What NSN replaces 4820-01-124-6679?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-124-6680, 4820-01-157-4304, 4820-01-216-7664. Verify interchangeability with system specifications before substitution.
What are the specifications of 255751ASSYJ?
Key specifications for 255751ASSYJ: Connection Style: SOCKET (TUBE) ALL ENDS; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS; Style Designator: STRAIGHT THRU; Nominal Outside Diameter Tube Accommodated: 0.375 INCHES ALL ENDS IN. 8 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-124-6679 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.