PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

423785-2Valve Assembly,environmental Con

Pacific Scientific Company Dba Pacific Scientific Co Div Services at Support Operations · NSN 1660-01-668-6580 · FSC 1660 · No Item Name Available
Verified by PartsTable
NSN 1660-01-668-6580 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-668-6580. Primary manufacturer part number: 423785-2.
Features
  • Valve Assembly,environmental Con — FSC 1660
  • 3 verified cross-references
  • Primary manufacturer: Pacific Scientific Company Dba Pacific Scientific Co Div Services at Support Operations
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve Assembly,environmental Con, cataloged under National Stock Number 1660-01-668-6580, is classified within Federal Supply Class 1660 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Pacific Scientific Company Dba Pacific Scientific Co Div Services at Support Operations. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1660-01-668-6580
Primary Part Number423785-2
Item NameValve Assembly,environmental Con
FSC / FSG1660 / 16 — No Item Name Available
ManufacturerPacific Scientific Company Dba Pacific Scientific Co Div Services at Support Operations
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4240-01-048-3096423785-2 INTERCHANGEABLE
Cartridge,respirator,air Filteri
Naval Air Warfare Center Aircraft Division Joint Base Jbmdl
Cross-Reference Index
Part NumberManufacturer
423785-2 Meggitt North Hollywood Inc (USA)
423785-2 PRIMARY Pacific Scientific Company Dba Pacific Scientific Co Div Services at Support Operations (USA)
423785-2 Jamaica Bearings Co., Inc. Dba Jamaica Bearings Co., Inc. (USA)
Related Parts
4240-01-048-3096INTERCHANGEABLE
CARTRIDGE,RESPIRATOR,AIR FILTERI
423785-2

Frequently Asked Questions

What is NSN 1660-01-668-6580?

NSN 1660-01-668-6580 is a Valve Assembly,environmental Con, manufactured by Pacific Scientific Company Dba Pacific Scientific Co Div Services at Support Operations, classified under FSC 1660 (No Item Name Available). Status: active.

What are the part numbers for NSN 1660-01-668-6580?

NSN 1660-01-668-6580 has 3 cross-referenced part numbers: 423785-2 (Meggitt North Hollywood Inc), 423785-2 (Pacific Scientific Company Dba Pacific Scientific Co Div Services at Support Operations), 423785-2 (Jamaica Bearings Co., Inc. Dba Jamaica Bearings Co., Inc.).

What NSN replaces 1660-01-668-6580?

There is 1 known substitute for 1660-01-668-6580: 4240-01-048-3096. Verify interchangeability with system specifications before substitution.

What are the specifications of 423785-2?

Key specifications for 423785-2: Part Name Assigned by Controlling Agency: VALVE,ECS; End Item Identification: P-8A POSEIDON AIRCRAFT A. 2 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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