PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

205305Thermostat,flow Control

Brinkley Technology Group Llc Dba Hercules Manufacturing · NSN 6685-00-354-2086 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-354-2086 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-354-2086. Primary manufacturer part number: 205305.
Features
  • Thermostat,flow Control — FSC 6685
  • Flow Control Device: CHOKE
  • Opening Temp Rating: 150.0 FAHRENHEIT MINIMUM AND 155.0 FAHRENHEIT MAXIMUM DEGF
  • FSC Application Data: ENGINE
  • Spring Operated Pressure Relief: NOT PROVIDED
  • Operating Temp Rating: 175.0 FAHRENHEIT NOMINAL DEGF
  • Largest Outside Diameter: 3.490 INCHES MINIMUM AND 3.498 INCHES MAXIMUM IN
  • Thermostat Type: BELLOWS
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Thermostat,flow Control, cataloged under National Stock Number 6685-00-354-2086, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-354-2086
Primary Part Number205305
Item NameThermostat,flow Control
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerBrinkley Technology Group Llc Dba Hercules Manufacturing
StatusACTIVE
Flow Control DeviceCHOKE
Opening Temp Rating150.0 FAHRENHEIT MINIMUM AND 155.0 FAHRENHEIT MAXIMUM DEGF
FSC Application DataENGINE
Spring Operated Pressure ReliefNOT PROVIDED
Operating Temp Rating175.0 FAHRENHEIT NOMINAL DEGF
Largest Outside Diameter3.490 INCHES MINIMUM AND 3.498 INCHES MAXIMUM IN
Thermostat TypeBELLOWS
Valve Travel Distance0.453 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
Usage DesignCOOL WATER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3020-00-030-7300 INTERCHANGEABLE
Gear Cluster
5310-00-044-4212130065 INTERCHANGEABLE
Washer,flat
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
6130-00-146-1520SRL40-25 INTERCHANGEABLE
Power Supply
Raytheon Company Dba Raytheon Co
8040-00-181-7634 INTERCHANGEABLE
Film Activator
4310-00-195-82103351 INTERCHANGEABLE
Breather
Altec Air, Llc Dba Altec Llc
5330-00-659-30303351 INTERCHANGEABLE
Seal,nonmetallic Round Section
Tennessee Valley Authority
5998-00-828-9141 INTERCHANGEABLE
Circuit Card Assembly
2940-00-920-685233230 INTERCHANGEABLE
Filter Element,fluid
Wix Corp
5342-00-936-5056 INTERCHANGEABLE
Clamp,test Stand
5950-00-997-3325335-1 INTERCHANGEABLE
Transformer,radio Frequency
American Trans-Coil Corp
Cross-Reference Index
Part NumberManufacturer
3351 Hercules Engine Co Inc (USA)
3351A Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
3351A Hercules Engine Co Inc (USA)
6255BS Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
6255BS Hercules Engine Co Inc (USA)
3351B Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
205305 PRIMARY Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
BB27775 Diamond Reo Truck Co (USA)
202691BS Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
205305 Hercules Engine Co Inc (USA)
130065 Celtrac Corp (USA)
3351 Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
3351B Hercules Engine Co Inc (USA)
202691BS Hercules Engine Co Inc (USA)
Related Parts
3020-00-030-7300INTERCHANGEABLE
GEAR CLUSTER
5310-00-044-4212INTERCHANGEABLE
WASHER,FLAT
130065
6130-00-146-1520INTERCHANGEABLE
POWER SUPPLY
SRL40-25
8040-00-181-7634INTERCHANGEABLE
FILM ACTIVATOR
4310-00-195-8210INTERCHANGEABLE
BREATHER
3351
5330-00-659-3030INTERCHANGEABLE
SEAL,NONMETALLIC ROUND SECTION
3351
5998-00-828-9141INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
2940-00-920-6852INTERCHANGEABLE
FILTER ELEMENT,FLUID
33230
5342-00-936-5056INTERCHANGEABLE
CLAMP,TEST STAND
5950-00-997-3325INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
335-1
5950-01-082-2810INTERCHANGEABLE
TRANSFORMER,POWER
FAAE2690
5330-01-264-3783INTERCHANGEABLE
GASKET
3351

Frequently Asked Questions

What is NSN 6685-00-354-2086?

NSN 6685-00-354-2086 is a Thermostat,flow Control, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-354-2086?

NSN 6685-00-354-2086 has 14 cross-referenced part numbers: 3351 (Hercules Engine Co Inc), 3351A (Brinkley Technology Group Llc Dba Hercules Manufacturing), 3351A (Hercules Engine Co Inc), 6255BS (Brinkley Technology Group Llc Dba Hercules Manufacturing), 6255BS (Hercules Engine Co Inc) and 9 more.

What NSN replaces 6685-00-354-2086?

There are 12 known substitutes for 6685-00-354-2086: 3020-00-030-7300, 5310-00-044-4212, 6130-00-146-1520 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 205305?

Key specifications for 205305: Overall Height: 4.266 INCHES NOMINAL IN; Flow Control Device: CHOKE; Opening Temp Rating: 150.0 FAHRENHEIT MINIMUM AND 155.0 FAHRENHEIT MAXIMUM DEGF; FSC Application Data: ENGINE. 10 total characteristics are documented in the Federal Logistics Information System.

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