PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

V-281Piston,valve

Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co. · NSN 4820-00-001-6181 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-001-6181 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-001-6181. Primary manufacturer part number: V-281.
Features
  • Piston,valve — FSC 4820
  • Material: COPPER ALLOY
  • Features Provided: GROOVED
  • Valve Design Control Activity: 23724
  • Outside Diameter: 0.4982 INCHES MINIMUM AND 0.4985 INCHES MAXIMUM IN
  • 3 verified cross-references
  • Primary manufacturer: Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy construction
General Description

The Piston,valve, cataloged under National Stock Number 4820-00-001-6181, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co.. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-001-6181
Primary Part NumberV-281
Item NamePiston,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerRuthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co.
StatusCANCELLED
MaterialCOPPER ALLOY
Features ProvidedGROOVED
Valve Design Control Activity23724
Outside Diameter0.4982 INCHES MINIMUM AND 0.4985 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
3110-00-155-6661 INTERCHANGEABLE
Bearing,ball,annular
4820-00-262-0400 INTERCHANGEABLE
Valve,flow Control
5330-00-395-3239802245 INTERCHANGEABLE
Gasket Set
Am General Llc
6625-00-714-4223206A INTERCHANGEABLE
Generator,signal
Keysight Technologies Inc
6635-00-956-0403206B INTERCHANGEABLE
Balloon,soil Test
Atest Company Dba Rainhart Company
5950-00-999-2412 INTERCHANGEABLE
Booster Unit Magnet
3419-01-014-9094206B INTERCHANGEABLE
Pipe Beveler Tool
Tri Tool Inc
5930-01-347-731890115 ITEM 10 INTERCHANGEABLE
Switch,toggle
Con-Tech Power Systems Iinc. Bernilled Plantcryogenicsschool of Medicine and Placement of Household Managers and Butlers
5930-01-348-036890115 ITEM 11 INTERCHANGEABLE
Switch,toggle
Con-Tech Power Systems Iinc. Bernilled Plantcryogenicsschool of Medicine and Placement of Household Managers and Butlers
8040-01-416-3070206-B 1QUART INTERCHANGEABLE
Hardener,adhesive
Gougeon Brothers, Inc Dba Gougeon Products Co
Cross-Reference Index
Part NumberManufacturer
V-281 Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co. (USA)
206A Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co. (USA)
206B Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co. (USA)
Related Parts
3110-00-155-6661INTERCHANGEABLE
BEARING,BALL,ANNULAR
4820-00-262-0400INTERCHANGEABLE
VALVE,FLOW CONTROL
5330-00-395-3239INTERCHANGEABLE
GASKET SET
802245
6625-00-714-4223INTERCHANGEABLE
GENERATOR,SIGNAL
206A
6635-00-956-0403INTERCHANGEABLE
BALLOON,SOIL TEST
206B
5950-00-999-2412INTERCHANGEABLE
BOOSTER UNIT MAGNET
3419-01-014-9094INTERCHANGEABLE
PIPE BEVELER TOOL
206B
5930-01-347-7318INTERCHANGEABLE
SWITCH,TOGGLE
90115 ITEM 10
5930-01-348-0368INTERCHANGEABLE
SWITCH,TOGGLE
90115 ITEM 11
8040-01-416-3070INTERCHANGEABLE
HARDENER,ADHESIVE
206-B 1QUART

Frequently Asked Questions

What is NSN 4820-00-001-6181?

NSN 4820-00-001-6181 is a Piston,valve, manufactured by Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co., classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-001-6181?

NSN 4820-00-001-6181 has 3 cross-referenced part numbers: V-281 (Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co.), 206A (Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co.), 206B (Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co.).

What NSN replaces 4820-00-001-6181?

There are 10 known substitutes for 4820-00-001-6181: 3110-00-155-6661, 4820-00-262-0400, 5330-00-395-3239 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of V-281?

Key specifications for V-281: Material: COPPER ALLOY; Features Provided: GROOVED; Valve Design Control Activity: 23724; Overall Length: 1.531 INCHES NOMINAL IN. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-001-6181 still in active supply?

NSN 4820-00-001-6181 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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