PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

721-8541924-52Valve,plug

Naval Sea Systems Command · NSN 4820-01-685-0036 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-685-0036 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-685-0036. Primary manufacturer part number: 721-8541924-52.
Features
  • Valve,plug — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Naval Sea Systems Command
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,plug, cataloged under National Stock Number 4820-01-685-0036, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Naval Sea Systems Command. 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.

Catalog Facts
Item NameValve,plug
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersNaval Sea Systems Command (CAGE 53711); Electric Boat Corporation Div General Dynamics Electric Boat (CAGE 96169)
Technical Specifications
ParameterValue
NSN4820-01-685-0036
Primary Part Number721-8541924-52
Item NameValve,plug
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-01-684-7256721-8541924-29 INTERCHANGEABLE
Seal,plain
Naval Sea Systems Command
5305-01-684-7340721-8541924-5 INTERCHANGEABLE
Screw,machine
Naval Sea Systems Command
5305-01-684-8628721-8541924-57 INTERCHANGEABLE
Setscrew
Naval Sea Systems Command
5305-01-684-8740721-8541924-40 INTERCHANGEABLE
Setscrew
Naval Sea Systems Command
5310-01-684-8803721-8541924-8 INTERCHANGEABLE
Washer,flat
Naval Sea Systems Command
5330-01-684-9988721-8541924-34 INTERCHANGEABLE
Seal,plain
Naval Sea Systems Command
3040-01-685-1664721-8541924-9 INTERCHANGEABLE
Rod,piston,linear Actuating Cyli
Naval Sea Systems Command
5315-01-685-1718721-8541924-53 INTERCHANGEABLE
Pin,straight,headless
Naval Sea Systems Command
3040-01-685-1738721-8541924-2 INTERCHANGEABLE
Piston,linear Actuating Cylinder
Naval Sea Systems Command
5360-01-685-1880721-8541924-14 INTERCHANGEABLE
Spring,helical,compression
Naval Sea Systems Command
Cross-Reference Index
Part NumberManufacturer
721-8541924 Naval Sea Systems Command (USA)
R861-1506-52 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
721-8541924-52 PRIMARY Naval Sea Systems Command (USA)
Related Parts
5330-01-684-7256INTERCHANGEABLE
SEAL,PLAIN
721-8541924-29
5305-01-684-7340INTERCHANGEABLE
SCREW,MACHINE
721-8541924-5
5305-01-684-8628INTERCHANGEABLE
SETSCREW
721-8541924-57
5305-01-684-8740INTERCHANGEABLE
SETSCREW
721-8541924-40
5310-01-684-8803INTERCHANGEABLE
WASHER,FLAT
721-8541924-8
5330-01-684-9988INTERCHANGEABLE
SEAL,PLAIN
721-8541924-34
3040-01-685-1664INTERCHANGEABLE
ROD,PISTON,LINEAR ACTUATING CYLI
721-8541924-9
5315-01-685-1718INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
721-8541924-53
3040-01-685-1738INTERCHANGEABLE
PISTON,LINEAR ACTUATING CYLINDER
721-8541924-2
5360-01-685-1880INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
721-8541924-14
5330-01-685-5228INTERCHANGEABLE
RETAINER,PACKING
AS5781P09-112
5330-01-685-6848INTERCHANGEABLE
RING,WIPER
SH959-41

Frequently Asked Questions

What is NSN 4820-01-685-0036?

NSN 4820-01-685-0036 is a Valve,plug, manufactured by Naval Sea Systems Command, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-685-0036?

NSN 4820-01-685-0036 has 3 cross-referenced part numbers: 721-8541924 (Naval Sea Systems Command), R861-1506-52 (Electric Boat Corporation Div General Dynamics Electric Boat), 721-8541924-52 (Naval Sea Systems Command).

What NSN replaces 4820-01-685-0036?

There are 12 known substitutes for 4820-01-685-0036: 5330-01-684-7256, 5305-01-684-7340, 5305-01-684-8628 and 9 more. Verify interchangeability with system specifications before substitution.

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