PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

43125Disk,valve

Spirax Sarco Inc Dba Spirax Sarco · NSN 4820-00-334-3865 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-334-3865 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-334-3865. Primary manufacturer part number: 43125.
Features
  • Disk,valve — FSC 4820
  • Thread Series Designator: UNF
  • Material: STEEL CORROSION RESISTING
  • Nominal Thread Size: 0.312 INCHES IN
  • Outside Diameter: 0.652 INCHES NOMINAL IN
  • Thread Class: 2B
  • 1 verified cross-reference
  • Primary manufacturer: Spirax Sarco Inc Dba Spirax Sarco
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting construction
General Description

The Disk,valve, cataloged under National Stock Number 4820-00-334-3865, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Spirax Sarco Inc Dba Spirax Sarco. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-334-3865
Primary Part Number43125
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSpirax Sarco Inc Dba Spirax Sarco
StatusACTIVE
Thread Series DesignatorUNF
MaterialSTEEL CORROSION RESISTING
Nominal Thread Size0.312 INCHES IN
Outside Diameter0.652 INCHES NOMINAL IN
Thread Class2B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3110-00-142-435743125 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5940-00-197-8751 INTERCHANGEABLE
Terminal,lug
5905-00-258-2575 INTERCHANGEABLE
Resistor,variable,wire Wound,non
5950-00-506-0350310-13773-01 INTERCHANGEABLE
Transformer,power Autotransforme
Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems
3010-01-091-22833-B-21 INTERCHANGEABLE
Insert,flexible Coupling
Charles Bond Company Dba Christiana Machine Company
6640-01-468-711643125 INTERCHANGEABLE
Analytical Column
Dionex Corporation
Cross-Reference Index
Part NumberManufacturer
43125 PRIMARY Spirax Sarco Inc Dba Spirax Sarco (USA)
Related Parts
3110-00-142-4357INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
43125
5940-00-197-8751INTERCHANGEABLE
TERMINAL,LUG
5905-00-258-2575INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
5950-00-506-0350INTERCHANGEABLE
TRANSFORMER,POWER AUTOTRANSFORME
310-13773-01
3010-01-091-2283INTERCHANGEABLE
INSERT,FLEXIBLE COUPLING
3-B-21
6640-01-468-7116INTERCHANGEABLE
ANALYTICAL COLUMN
43125

Frequently Asked Questions

What is NSN 4820-00-334-3865?

NSN 4820-00-334-3865 is a Disk,valve, manufactured by Spirax Sarco Inc Dba Spirax Sarco, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-334-3865?

NSN 4820-00-334-3865 has 1 cross-referenced part number: 43125 (Spirax Sarco Inc Dba Spirax Sarco).

What NSN replaces 4820-00-334-3865?

There are 6 known substitutes for 4820-00-334-3865: 3110-00-142-4357, 5940-00-197-8751, 5905-00-258-2575 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 43125?

Key specifications for 43125: Thread Series Designator: UNF; Overall Height: 1.080 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING; Nominal Thread Size: 0.312 INCHES IN. 6 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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