PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11871Valve Assembly,flow

Triumph Thermal Systems - Maryland, Inc. · NSN 1660-00-397-5375 · FSC 1660 · No Item Name Available
Verified by PartsTable
NSN 1660-00-397-5375 — this item is cataloged by the U.S. Government under National Stock Number 1660-00-397-5375. Primary manufacturer part number: 11871.
Features
  • Valve Assembly,flow — FSC 1660
  • 2 verified cross-references
  • Primary manufacturer: Triumph Thermal Systems - Maryland, Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve Assembly,flow, cataloged under National Stock Number 1660-00-397-5375, is classified within Federal Supply Class 1660 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Triumph Thermal Systems - Maryland, Inc.. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameValve Assembly,flow
FSC / FSG1660 — No Item Name Available (FSG 16)
ManufacturersLockheed Martin Corp (CAGE 98897); Triumph Thermal Systems - Maryland, Inc. (CAGE 01359)
Technical Specifications
ParameterValue
NSN1660-00-397-5375
Primary Part Number11871
Item NameValve Assembly,flow
FSC / FSG1660 / 16 — No Item Name Available
ManufacturerTriumph Thermal Systems - Maryland, Inc.
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5945-00-284-313511871 INTERCHANGEABLE
Relay,electromagnetic
Thales Usa, Inc. Div Air Mobility Solutions ("ams")
5120-00-293-2384 INTERCHANGEABLE
Bar,wrecking
4820-00-676-165011871 INTERCHANGEABLE
Plug,rotary,valve
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5950-00-706-9426 INTERCHANGEABLE
Coil,radio Frequency
4935-00-980-2864 INTERCHANGEABLE
Converter Unit
1377-01-085-1852779V010D004-7 INTERCHANGEABLE
Initiator,pressure,actuated
Universal Propulsion Company Inc Dba Goodrich Div Universal Propulsion Co., Inc.
5305-01-421-946611871 INTERCHANGEABLE
Screw,machine
Spx Fluid Power
2540-01-580-17696443323-01M1 INTERCHANGEABLE
Insulation,vehicular
Bae Systems Land & Armaments L.p.
Cross-Reference Index
Part NumberManufacturer
644332-3 Lockheed Martin Corp (USA)
11871 PRIMARY Triumph Thermal Systems - Maryland, Inc. (USA)
Related Parts
5945-00-284-3135INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
11871
5120-00-293-2384INTERCHANGEABLE
BAR,WRECKING
4820-00-676-1650INTERCHANGEABLE
PLUG,ROTARY,VALVE
11871
5950-00-706-9426INTERCHANGEABLE
COIL,RADIO FREQUENCY
4935-00-980-2864INTERCHANGEABLE
CONVERTER UNIT
1377-01-085-1852INTERCHANGEABLE
INITIATOR,PRESSURE,ACTUATED
779V010D004-7
5305-01-421-9466INTERCHANGEABLE
SCREW,MACHINE
11871
2540-01-580-1769INTERCHANGEABLE
INSULATION,VEHICULAR
6443323-01M1

Frequently Asked Questions

What is NSN 1660-00-397-5375?

NSN 1660-00-397-5375 is a Valve Assembly,flow, manufactured by Triumph Thermal Systems - Maryland, Inc., classified under FSC 1660 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 1660-00-397-5375?

NSN 1660-00-397-5375 has 2 cross-referenced part numbers: 644332-3 (Lockheed Martin Corp), 11871 (Triumph Thermal Systems - Maryland, Inc.).

What NSN replaces 1660-00-397-5375?

There are 8 known substitutes for 1660-00-397-5375: 5945-00-284-3135, 5120-00-293-2384, 4820-00-676-1650 and 5 more. Verify interchangeability with system specifications before substitution.

Is NSN 1660-00-397-5375 still in active supply?

NSN 1660-00-397-5375 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com