PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

803-2177142-51X-02ADisk,valve

Naval Sea Systems Command · NSN 4820-01-067-9924 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-067-9924 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-067-9924. Primary manufacturer part number: 803-2177142-51X-02A.
Features
  • Disk,valve — FSC 4820
  • Outside Diameter: 4.125 INCHES NOMINAL IN
  • Thread Series Designator: UN
  • Thread Quantity Per Inch: 12
  • Material: STEEL
  • Shoulder Width: 0.560 INCHES NOMINAL IN
  • Nominal Thread Size: 2.500 INCHES IN
  • Style Designator: PLUG
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel construction
General Description

The Disk,valve, cataloged under National Stock Number 4820-01-067-9924, 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. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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: Active.

Technical Specifications
ParameterValue
NSN4820-01-067-9924
Primary Part Number803-2177142-51X-02A
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
Outside Diameter4.125 INCHES NOMINAL IN
Thread Series DesignatorUN
Thread Quantity Per Inch12
MaterialSTEEL
Shoulder Width0.560 INCHES NOMINAL IN
Nominal Thread Size2.500 INCHES IN
Style DesignatorPLUG
Seat Angle45.0 DEGREES NOMINAL
Shoulder Height1.156 INCHES NOMINAL IN
Thread Class2B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
4820-01-091-2955803-2177142-5XX-15 INTERCHANGEABLE
Collar,stem Guide
Naval Ship Systems Command
4820-01-091-8124803-2177142-51X-3A INTERCHANGEABLE
Body Guided Disk Nut,valve
Naval Ship Systems Command
4820-01-091-8125803-2177142-5XX-9A INTERCHANGEABLE
Retainer,bonnet
Naval Ship Systems Command
4820-01-091-8126803-2177142-5XX-12 INTERCHANGEABLE
Gland,valve
Naval Ship Systems Command
4820-01-125-9821803-2177142-5XX-23 INTERCHANGEABLE
Handwheel Locknut,valve
Naval Ship Systems Command
4820-01-215-4342803-2177142-5XX-5A INTERCHANGEABLE
Cap,valve
Naval Ship Systems Command
4820-01-215-4343803-2177142-51X-17 INTERCHANGEABLE
Cap,valve
Naval Ship Systems Command
4820-01-219-5591803-2177142-512 INTERCHANGEABLE
Valve,globe
Naval Ship Systems Command
4820-01-274-3609803-2177142-514 INTERCHANGEABLE
Valve,globe
Naval Ship Systems Command
4820-01-666-1560803-2177142-54X-88 INTERCHANGEABLE
Stem,fluid Valve
Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
803-2177142-51X-02A PRIMARY Naval Sea Systems Command (USA)
803-2177142 Naval Sea Systems Command (USA)
Related Parts
4820-01-091-2955INTERCHANGEABLE
COLLAR,STEM GUIDE
803-2177142-5XX-15
4820-01-091-8124INTERCHANGEABLE
BODY GUIDED DISK NUT,VALVE
803-2177142-51X-3A
4820-01-091-8125INTERCHANGEABLE
RETAINER,BONNET
803-2177142-5XX-9A
4820-01-091-8126INTERCHANGEABLE
GLAND,VALVE
803-2177142-5XX-12
4820-01-125-9821INTERCHANGEABLE
HANDWHEEL LOCKNUT,VALVE
803-2177142-5XX-23
4820-01-215-4342INTERCHANGEABLE
CAP,VALVE
803-2177142-5XX-5A
4820-01-215-4343INTERCHANGEABLE
CAP,VALVE
803-2177142-51X-17
4820-01-219-5591INTERCHANGEABLE
VALVE,GLOBE
803-2177142-512
4820-01-274-3609INTERCHANGEABLE
VALVE,GLOBE
803-2177142-514
4820-01-666-1560INTERCHANGEABLE
STEM,FLUID VALVE
803-2177142-54X-88

Frequently Asked Questions

What is NSN 4820-01-067-9924?

NSN 4820-01-067-9924 is a Disk,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-067-9924?

NSN 4820-01-067-9924 has 2 cross-referenced part numbers: 803-2177142-51X-02A (Naval Sea Systems Command), 803-2177142 (Naval Sea Systems Command).

What NSN replaces 4820-01-067-9924?

There are 10 known substitutes for 4820-01-067-9924: 4820-01-091-2955, 4820-01-091-8124, 4820-01-091-8125 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 803-2177142-51X-02A?

Key specifications for 803-2177142-51X-02A: Overall Height: 2.275 INCHES NOMINAL IN; Outside Diameter: 4.125 INCHES NOMINAL IN; Thread Series Designator: UN; Thread Quantity Per Inch: 12. 11 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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