PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RC202A5Thermostat,flow Control

Diamond Reo Truck Co · NSN 6685-00-364-5087 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-364-5087 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-364-5087. Primary manufacturer part number: RC202A5.
Features
  • Thermostat,flow Control — FSC 6685
  • Thermostat Type: SOLID EXPANSION
  • Largest Outside Diameter: 2.120 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN
  • Valve Travel Distance: 0.250 INCHES NOMINAL IN
  • Flow Control Device: BY-PASS
  • Opening Temp Rating: 160.0 FAHRENHEIT NOMINAL DEGF
  • Operating Temp Rating: 175.0 FAHRENHEIT NOMINAL DEGF
  • Spring Operated Pressure Relief: NOT PROVIDED
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Thermostat,flow Control, cataloged under National Stock Number 6685-00-364-5087, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Diamond Reo Truck Co. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-364-5087
Primary Part NumberRC202A5
Item NameThermostat,flow Control
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerDiamond Reo Truck Co
StatusACTIVE
Thermostat TypeSOLID EXPANSION
Largest Outside Diameter2.120 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN
Valve Travel Distance0.250 INCHES NOMINAL IN
Flow Control DeviceBY-PASS
Opening Temp Rating160.0 FAHRENHEIT NOMINAL DEGF
Operating Temp Rating175.0 FAHRENHEIT NOMINAL DEGF
Spring Operated Pressure ReliefNOT PROVIDED
Usage DesignREGULATE TEMPERATURE OF ENGINE COOLANT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5365-01-190-406067898 INTERCHANGEABLE
Spacer,ring
Eaton Aerospace, Llc Dba Jackson South
5330-01-333-48673606514-1 INTERCHANGEABLE
Seal,plain Encased
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
Cross-Reference Index
Part NumberManufacturer
RC202A5 Diamond Reo Truck Co (USA)
67898 Cummins Inc. (USA)
H67898 Cummins Inc. (USA)
7033915 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
404766 White Motor Corp (USA)
Related Parts
5365-01-190-4060INTERCHANGEABLE
SPACER,RING
67898
5330-01-333-4867INTERCHANGEABLE
SEAL,PLAIN ENCASED
3606514-1

Frequently Asked Questions

What is NSN 6685-00-364-5087?

NSN 6685-00-364-5087 is a Thermostat,flow Control, manufactured by Diamond Reo Truck Co, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-364-5087?

NSN 6685-00-364-5087 has 5 cross-referenced part numbers: RC202A5 (Diamond Reo Truck Co), 67898 (Cummins Inc.), H67898 (Cummins Inc.), 7033915 (U S Army Tank Automotive Command Amsta-Im-Mm), 404766 (White Motor Corp).

What NSN replaces 6685-00-364-5087?

There are 2 known substitutes for 6685-00-364-5087: 5365-01-190-4060, 5330-01-333-4867. Verify interchangeability with system specifications before substitution.

What are the specifications of RC202A5?

Key specifications for RC202A5: Thermostat Type: SOLID EXPANSION; Largest Outside Diameter: 2.120 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN; Valve Travel Distance: 0.250 INCHES NOMINAL IN; Flow Control Device: BY-PASS. 9 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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