PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

330576 ASSY DValve,check

Eaton Corporation Dba Eaton Inoac Div Eaton · NSN 4820-01-305-9790 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-305-9790 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-305-9790. Primary manufacturer part number: 330576 ASSY D.
Features
  • Valve,check — FSC 4820
  • Material: STEEL COMP 303 BODY
  • Material: STEEL COMP 416 FLOW CONTROL DEVICE
  • Style Designator: STRAIGHT THRU
  • Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
  • Flow Control Device: DISK
  • Disk Loading Method: SPRING
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 303 Body construction
General Description

The Valve,check, cataloged under National Stock Number 4820-01-305-9790, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Eaton Corporation Dba Eaton Inoac Div Eaton. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-305-9790
Primary Part Number330576 ASSY D
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEaton Corporation Dba Eaton Inoac Div Eaton
StatusACTIVE
MaterialSTEEL COMP 303 BODY
MaterialSTEEL COMP 416 FLOW CONTROL DEVICE
Style DesignatorSTRAIGHT THRU
Operating Pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Media for Which DesignedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
Flow Control DeviceDISK
Disk Loading MethodSPRING
Nominal Pipe Size Accommodated0.750 INCHES ALL ENDS IN
Connection StyleSOCKET (PIPE) ALL ENDS
Mounting PositionHORIZONTAL OR VERTICAL
Connection TypeUNTHREADED INTERNAL PIPE ALL ENDS
Valve Operation MethodAUTOMATIC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-01-297-9164330576 PIECE 1003 INTERCHANGEABLE
Gland,check Valve
Eaton Corporation Dba Eaton Inoac Div Eaton
4820-01-297-9165330576 PIECE 1005 INTERCHANGEABLE
Gland,check Valve
Eaton Corporation Dba Eaton Inoac Div Eaton
4820-01-298-2197330576 ASSY C INTERCHANGEABLE
Valve,check
Eaton Corporation Dba Eaton Inoac Div Eaton
4820-01-298-2269330576 PIECE 905 INTERCHANGEABLE
Cage,valve
Eaton Corporation Dba Eaton Inoac Div Eaton
4820-01-298-2326330576 PIECE 803 INTERCHANGEABLE
Disk,valve
Eaton Corporation Dba Eaton Inoac Div Eaton
4820-01-298-5232330576 ASSY F INTERCHANGEABLE
Valve,check
Eaton Corporation Dba Eaton Inoac Div Eaton
4820-01-298-5237330576 ASSY E INTERCHANGEABLE
Valve,check
Eaton Corporation Dba Eaton Inoac Div Eaton
4820-01-298-5372330576 PIECE 907 INTERCHANGEABLE
Cage,valve
Eaton Corporation Dba Eaton Inoac Div Eaton
4820-01-298-5502330576 PIECE 807 INTERCHANGEABLE
Disk,valve
Eaton Corporation Dba Eaton Inoac Div Eaton
4820-01-299-4091330576 PIECE 1006 INTERCHANGEABLE
Gland,check Valve
Eaton Corporation Dba Eaton Inoac Div Eaton
Cross-Reference Index
Part NumberManufacturer
330576 Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
330576 ASSY D PRIMARY Eaton Corporation Dba Eaton Inoac Div Eaton (USA)
330576 ASSY D Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
Related Parts
4820-01-297-9164INTERCHANGEABLE
GLAND,CHECK VALVE
330576 PIECE 1003
4820-01-297-9165INTERCHANGEABLE
GLAND,CHECK VALVE
330576 PIECE 1005
4820-01-298-2197INTERCHANGEABLE
VALVE,CHECK
330576 ASSY C
4820-01-298-2269INTERCHANGEABLE
CAGE,VALVE
330576 PIECE 905
4820-01-298-2326INTERCHANGEABLE
DISK,VALVE
330576 PIECE 803
4820-01-298-5232INTERCHANGEABLE
VALVE,CHECK
330576 ASSY F
4820-01-298-5237INTERCHANGEABLE
VALVE,CHECK
330576 ASSY E
4820-01-298-5372INTERCHANGEABLE
CAGE,VALVE
330576 PIECE 907
4820-01-298-5502INTERCHANGEABLE
DISK,VALVE
330576 PIECE 807
4820-01-299-4091INTERCHANGEABLE
GLAND,CHECK VALVE
330576 PIECE 1006
4820-01-299-4092INTERCHANGEABLE
GLAND,CHECK VALVE
330576 PIECE 1007
4820-01-300-8511INTERCHANGEABLE
VALVE,CHECK
54415

Frequently Asked Questions

What is NSN 4820-01-305-9790?

NSN 4820-01-305-9790 is a Valve,check, manufactured by Eaton Corporation Dba Eaton Inoac Div Eaton, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-305-9790?

NSN 4820-01-305-9790 has 3 cross-referenced part numbers: 330576 (Huntington Ingalls Inc Div Newport News Shipbuilding), 330576 ASSY D (Eaton Corporation Dba Eaton Inoac Div Eaton), 330576 ASSY D (Huntington Ingalls Inc Div Newport News Shipbuilding).

What NSN replaces 4820-01-305-9790?

There are 12 known substitutes for 4820-01-305-9790: 4820-01-297-9164, 4820-01-297-9165, 4820-01-298-2197 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 330576 ASSY D?

Key specifications for 330576 ASSY D: Material: STEEL COMP 303 BODY; Material: STEEL COMP 416 FLOW CONTROL DEVICE; Style Designator: STRAIGHT THRU; Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 12 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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