PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

155-58Thermostat,flow Control

Schneider Electric Systems Usa Inc · NSN 6685-00-530-7509 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-530-7509 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-530-7509. Primary manufacturer part number: 155-58.
Features
  • Thermostat,flow Control — FSC 6685
  • FSC Application Data: ENGINE,NONAIRCRAFT
  • Mounting Method: FLANGE
  • Spring Operated Pressure Relief: NOT PROVIDED
  • Thermostat Type: BELLOWS
  • Valve Travel Distance: 0.313 INCHES NOMINAL IN
  • Largest Outside Diameter: 2.120 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN
  • Opening Temp Rating: 155.0 FAHRENHEIT NOMINAL DEGF
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Thermostat,flow Control, cataloged under National Stock Number 6685-00-530-7509, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Schneider Electric Systems Usa Inc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 6 manufacturers, 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
NSN6685-00-530-7509
Primary Part Number155-58
Item NameThermostat,flow Control
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerSchneider Electric Systems Usa Inc
StatusACTIVE
FSC Application DataENGINE,NONAIRCRAFT
Mounting MethodFLANGE
Spring Operated Pressure ReliefNOT PROVIDED
Thermostat TypeBELLOWS
Valve Travel Distance0.313 INCHES NOMINAL IN
Largest Outside Diameter2.120 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN
Opening Temp Rating155.0 FAHRENHEIT NOMINAL DEGF
Flow Control DeviceBY-PASS
Usage DesignCOOL ENGINE WATER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5962-00-063-9321320001P1 INTERCHANGEABLE
Microcircuit,digital
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
5940-00-237-6762SMB182816 INTERCHANGEABLE
Terminal Board
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5360-00-987-0438513227 INTERCHANGEABLE
Spring,helical,compression
Hamilton Sundstrand Corporation Dba Collins Aerospace
3120-01-122-0405 INTERCHANGEABLE
Bearing,washer,thrust
4730-01-304-5565 INTERCHANGEABLE
Air Drier and Cooler,pipeline
Cross-Reference Index
Part NumberManufacturer
155-58 PRIMARY Schneider Electric Systems Usa Inc (USA)
2A117 Schneider Electric Systems Usa Inc (USA)
5307509 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
3124410 General Motors Corp (USA)
3124410 General Motors Corp Harrison Radiator Div (USA)
8329560 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
155SB Schneider Electric Systems Usa Inc (USA)
513227 Sasco Inc Canadian Div
5307508 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
3124410 General Motors Llc Dba General Motors Llc (USA)
Related Parts
5962-00-063-9321INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
320001P1
5940-00-237-6762INTERCHANGEABLE
TERMINAL BOARD
SMB182816
5360-00-987-0438INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
513227
3120-01-122-0405INTERCHANGEABLE
BEARING,WASHER,THRUST
4730-01-304-5565INTERCHANGEABLE
AIR DRIER AND COOLER,PIPELINE

Frequently Asked Questions

What is NSN 6685-00-530-7509?

NSN 6685-00-530-7509 is a Thermostat,flow Control, manufactured by Schneider Electric Systems Usa Inc, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-530-7509?

NSN 6685-00-530-7509 has 10 cross-referenced part numbers: 155-58 (Schneider Electric Systems Usa Inc), 2A117 (Schneider Electric Systems Usa Inc), 5307509 (U S Army Tank Automotive Command Amsta-Im-Mm), 3124410 (General Motors Corp), 3124410 (General Motors Corp Harrison Radiator Div) and 5 more.

What NSN replaces 6685-00-530-7509?

There are 5 known substitutes for 6685-00-530-7509: 5962-00-063-9321, 5940-00-237-6762, 5360-00-987-0438 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 155-58?

Key specifications for 155-58: FSC Application Data: ENGINE,NONAIRCRAFT; Mounting Method: FLANGE; Spring Operated Pressure Relief: NOT PROVIDED; Thermostat Type: BELLOWS. 10 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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