PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2351-1121Valve,calibrated Flow

Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division · NSN 4820-01-225-5841 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-225-5841 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-225-5841. Primary manufacturer part number: 2351-1121.
Features
  • Valve,calibrated Flow — FSC 4820
  • First End Connection Type: UNTHREADED INTERNAL PIPE
  • First End Style Designator: SOCKET W/BRAZING RING
  • Media for Which Designed: WATER
  • Material: RUBBER FLOW CONTROL DEVICE
  • Second End Relationship with First End: IDENTICAL
  • Flow Control Device: DIAPHRAGM
  • Body Style: STRAIGHT THRU
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Rubber Flow Control Device construction
General Description

The Valve,calibrated Flow, cataloged under National Stock Number 4820-01-225-5841, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-225-5841
Primary Part Number2351-1121
Item NameValve,calibrated Flow
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerRomac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
StatusCANCELLED
First End Connection TypeUNTHREADED INTERNAL PIPE
First End Style DesignatorSOCKET W/BRAZING RING
Media for Which DesignedWATER
MaterialRUBBER FLOW CONTROL DEVICE
Second End Relationship with First EndIDENTICAL
Flow Control DeviceDIAPHRAGM
Body StyleSTRAIGHT THRU
First End Nominal Pipe Size Accommodated0.750 INCHES IN
End Connection Quantity2
Valve Discharge Flow Rate4.0 GALLONS PER MINUTE
MaterialCOPPER ALLOY BODY
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3040-00-105-9245 INTERCHANGEABLE
Connecting Link,rigid
5935-01-058-195358090 INTERCHANGEABLE
Connector,plug,electrical
L3harris Technologies, Inc.
4820-01-113-18202351-1151 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
4820-01-441-4044580893-8 INTERCHANGEABLE
Valve,calibrated Flow
Raytheon Company Dba Raytheon Co
4820-01-441-4045580893-3 INTERCHANGEABLE
Valve,calibrated Flow
Raytheon Company Dba Raytheon Co
4820-01-441-4048580893-10 INTERCHANGEABLE
Valve,calibrated Flow
Raytheon Company Dba Raytheon Co
4820-01-441-8989580893-9 INTERCHANGEABLE
Valve,calibrated Flow
Raytheon Company Dba Raytheon Co
4820-01-442-13912353-1342T INTERCHANGEABLE
Valve,calibrated Flow
Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
4820-01-560-20115862-5SK INTERCHANGEABLE
Parts Kit,valve
Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
4820-01-619-50432351-1162 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division
Cross-Reference Index
Part NumberManufacturer
580893-4 Raytheon Company (USA)
580893 Raytheon Company Dba Raytheon Co (USA)
2351-1121 PRIMARY Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division (USA)
580893 Raytheon Company Div Corp (USA)
580893-4 Raytheon Company Div Corp (USA)
7083C6-2351-1121 PRIMARY Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division (USA)
580893-4 Raytheon Company Dba Raytheon Co (USA)
7083-C Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division (USA)
Related Parts
3040-00-105-9245INTERCHANGEABLE
CONNECTING LINK,RIGID
5935-01-058-1953INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
58090
4820-01-113-1820INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
2351-1151
4820-01-441-4044INTERCHANGEABLE
VALVE,CALIBRATED FLOW
580893-8
4820-01-441-4045INTERCHANGEABLE
VALVE,CALIBRATED FLOW
580893-3
4820-01-441-4048INTERCHANGEABLE
VALVE,CALIBRATED FLOW
580893-10
4820-01-441-8989INTERCHANGEABLE
VALVE,CALIBRATED FLOW
580893-9
4820-01-442-1391INTERCHANGEABLE
VALVE,CALIBRATED FLOW
2353-1342T
4820-01-560-2011INTERCHANGEABLE
PARTS KIT,VALVE
5862-5SK
4820-01-619-5043INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
2351-1162
4820-01-687-1334INTERCHANGEABLE
REPAIR KIT,VALVE
5862-7SK
4820-01-710-6542INTERCHANGEABLE
PARTS KIT,VALVE
5862-2SK

Frequently Asked Questions

What is NSN 4820-01-225-5841?

NSN 4820-01-225-5841 is a Valve,calibrated Flow, manufactured by Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-225-5841?

NSN 4820-01-225-5841 has 8 cross-referenced part numbers: 580893-4 (Raytheon Company), 580893 (Raytheon Company Dba Raytheon Co), 2351-1121 (Romac Industries, Inc. Dba Hays Fluid Controls Div Hays Fluid Controls Division), 580893 (Raytheon Company Div Corp), 580893-4 (Raytheon Company Div Corp) and 3 more.

What NSN replaces 4820-01-225-5841?

There are 12 known substitutes for 4820-01-225-5841: 3040-00-105-9245, 5935-01-058-1953, 4820-01-113-1820 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2351-1121?

Key specifications for 2351-1121: First End Connection Type: UNTHREADED INTERNAL PIPE; First End Style Designator: SOCKET W/BRAZING RING; Media for Which Designed: WATER; Material: RUBBER FLOW CONTROL DEVICE. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-225-5841 still in active supply?

NSN 4820-01-225-5841 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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