PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8721Stem,fluid Valve

Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect · NSN 4820-01-278-5587 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-278-5587 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-278-5587. Primary manufacturer part number: 8721.
Features
  • Stem,fluid Valve — FSC 4820
  • Stem Actuating End Type: THREADED EXTERNALLY
  • Material: STEEL CORROSION RESISTING
  • Largest Outside Diameter: 0.500 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting construction
General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-01-278-5587, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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
NSN4820-01-278-5587
Primary Part Number8721
Item NameStem,fluid Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect
StatusACTIVE
Stem Actuating End TypeTHREADED EXTERNALLY
MaterialSTEEL CORROSION RESISTING
Largest Outside Diameter0.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-151-95608721 INTERCHANGEABLE
Bearing,roller,tapered
Eaton Corporation Dba Airflex Div Div Airflex
4820-00-238-6473 INTERCHANGEABLE
Valve,safety Relief
5935-00-259-44158721 INTERCHANGEABLE
Connector,receptacle,electrical
Western Union Telegraph Co Sub of Western Union Corp
4730-00-326-2443 INTERCHANGEABLE
Restrictor Unit,fluid Flow
5360-00-446-8827D15-792JPC607 INTERCHANGEABLE
Spring,helical,compression
Northrop Grumman Systems Corporation Div Marine Systems
5305-00-738-07168721 INTERCHANGEABLE
Screw,shoulder
Circor Aerospace, Inc. Div Circor
5975-00-925-9314 INTERCHANGEABLE
Box Connector,electrical
5895-01-101-62988721 INTERCHANGEABLE
Divider,power,radio Frequency
Marc Alan Group the, Inc
5360-01-111-791175-LM INTERCHANGEABLE
Spring,helical,compression
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
5930-01-114-70598721 INTERCHANGEABLE
Switch,rotary
Electro Impulse Laboratory Inc Dba Electro Impulse Inc
Cross-Reference Index
Part NumberManufacturer
8721 PRIMARY Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect (USA)
8721 Air Dry Co of America, Llc (USA)
Related Parts
3110-00-151-9560INTERCHANGEABLE
BEARING,ROLLER,TAPERED
8721
4820-00-238-6473INTERCHANGEABLE
VALVE,SAFETY RELIEF
5935-00-259-4415INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
8721
4730-00-326-2443INTERCHANGEABLE
RESTRICTOR UNIT,FLUID FLOW
5360-00-446-8827INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
D15-792JPC607
5305-00-738-0716INTERCHANGEABLE
SCREW,SHOULDER
8721
5975-00-925-9314INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
5895-01-101-6298INTERCHANGEABLE
DIVIDER,POWER,RADIO FREQUENCY
8721
5360-01-111-7911INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
75-LM
5930-01-114-7059INTERCHANGEABLE
SWITCH,ROTARY
8721
5120-01-128-3056INTERCHANGEABLE
ALIGNMENT TOOL,ELECTRONIC EQUIPM
7907108-00
4820-01-131-5917INTERCHANGEABLE
VALVE,SAFETY RELIEF
E8721KM51M

Frequently Asked Questions

What is NSN 4820-01-278-5587?

NSN 4820-01-278-5587 is a Stem,fluid Valve, manufactured by Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-278-5587?

NSN 4820-01-278-5587 has 2 cross-referenced part numbers: 8721 (Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect), 8721 (Air Dry Co of America, Llc).

What NSN replaces 4820-01-278-5587?

There are 12 known substitutes for 4820-01-278-5587: 3110-00-151-9560, 4820-00-238-6473, 5935-00-259-4415 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8721?

Key specifications for 8721: Stem Actuating End Type: THREADED EXTERNALLY; Material: STEEL CORROSION RESISTING; Largest Outside Diameter: 0.500 INCHES NOMINAL IN; Overall Length: 3.000 INCHES NOMINAL IN. 4 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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