PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31812Piston,valve

Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace · NSN 4820-01-407-3238 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-407-3238 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-407-3238. Primary manufacturer part number: 31812.
Features
  • Piston,valve — FSC 4820
  • Valve Design Control Activity: 78062
  • Material Document and Classification: AMS 5659 ASSN STD SINGLE MATERIAL RESPONSE
  • Valve Type for Which Designed: CHECK
  • Material: STEEL CORROSION RESISTING
  • Valve Model Number for Which Designed: 21263
  • 1 verified cross-reference
  • Primary manufacturer: Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting construction
General Description

The Piston,valve, cataloged under National Stock Number 4820-01-407-3238, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace. 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-407-3238
Primary Part Number31812
Item NamePiston,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
StatusACTIVE
Valve Design Control Activity78062
Material Document and ClassificationAMS 5659 ASSN STD SINGLE MATERIAL RESPONSE
Valve Type for Which DesignedCHECK
MaterialSTEEL CORROSION RESISTING
Valve Model Number for Which Designed21263
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5940-00-197-9743MS20659-12 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
5935-01-281-2235 INTERCHANGEABLE
Connector,receptacle,electrical
4730-01-315-778031812 INTERCHANGEABLE
Expansion Joint,pipe
Hyspan Precision Products, Inc.
5998-01-326-6120 INTERCHANGEABLE
Circuit Card Assembly
5940-01-666-332031812 INTERCHANGEABLE
Terminal,lug
Te Connectivity Corporation
Cross-Reference Index
Part NumberManufacturer
31812 PRIMARY Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
Related Parts
5940-00-197-9743INTERCHANGEABLE
TERMINAL,LUG
MS20659-12
5935-01-281-2235INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
4730-01-315-7780INTERCHANGEABLE
EXPANSION JOINT,PIPE
31812
5998-01-326-6120INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5940-01-666-3320INTERCHANGEABLE
TERMINAL,LUG
31812

Frequently Asked Questions

What is NSN 4820-01-407-3238?

NSN 4820-01-407-3238 is a Piston,valve, manufactured by Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-407-3238?

NSN 4820-01-407-3238 has 1 cross-referenced part number: 31812 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace).

What NSN replaces 4820-01-407-3238?

There are 5 known substitutes for 4820-01-407-3238: 5940-00-197-9743, 5935-01-281-2235, 4730-01-315-7780 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31812?

Key specifications for 31812: Valve Design Control Activity: 78062; Material Document and Classification: AMS 5659 ASSN STD SINGLE MATERIAL RESPONSE; Valve Type for Which Designed: CHECK; Material: STEEL CORROSION RESISTING. 5 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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