PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20T21Thermometer,indicating,capillary

Enovation Controls Llc · NSN 6685-00-786-4050 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-786-4050 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-786-4050. Primary manufacturer part number: 20T21.
Features
  • Thermometer,indicating,capillary — FSC 6685
  • Extension Neck Length: 0.750 INCHES NOMINAL IN
  • Case Diameter: 2.063 INCHES NOMINAL IN
  • Bulb Tip Length: 1.500 INCHES NOMINAL IN
  • Bulb Connection Type: THREADED
  • Pointer/pen Type and Quantity: 1 INDICATING SINGLE
  • Material: COPPER BULB
  • Material: STEEL METER CASE
Applications
  • Applications requiring Copper Bulb construction
General Description

The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-00-786-4050, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Enovation Controls Llc. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-786-4050
Primary Part Number20T21
Item NameThermometer,indicating,capillary
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerEnovation Controls Llc
StatusCANCELLED
Extension Neck Length0.750 INCHES NOMINAL IN
Case Diameter2.063 INCHES NOMINAL IN
Bulb Tip Length1.500 INCHES NOMINAL IN
Bulb Connection TypeTHREADED
Pointer/pen Type and Quantity1 INDICATING SINGLE
MaterialCOPPER BULB
MaterialSTEEL METER CASE
Style DesignatorBULB W/O SOCKET
Indicator Connection MethodFLEXIBLE TUBE
Active Portion Diameter0.344 INCHES NOMINAL IN
Case TypeVAPORPROOF
Active Portion Length1.500 INCHES NOMINAL IN
Scale Inscription/background ColorBLACK MARKING ON WHITE
Scale TypeCONCENTRIC DIAL
Bulb Quantity1
Actuating MediumVAPOR TENSION
Dial Diameter2.000 INCHES NOMINAL IN
Flexible Tube Length48.000 INCHES NOMINAL IN
Bulb StylePLAIN BULB W/BENDABLE EXTENSION
Bulb TypePLAIN RIGID
Bulb Overall Length2.250 INCHES NOMINAL IN
Scale Smallest Increment10.0 DEG FAHRENHEIT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
5905-00-106-9344 INTERCHANGEABLE
Resistor,fixed,composition
6685-00-524-9210 INTERCHANGEABLE
Thermometer,indicating,capillary
6685-00-677-7134 INTERCHANGEABLE
Thermometer,indicating,capillary
5930-00-955-990320T21-26580 INTERCHANGEABLE
Switch,thermostatic
Therm-O-Disc Incorporated
6685-00-977-4272 INTERCHANGEABLE
Thermometer,indicating,capillary
5865-01-101-5881 INTERCHANGEABLE
Modulator,reference
6620-01-229-6478 INTERCHANGEABLE
Indicator,engine Temperature
5365-01-649-458810149-8 INTERCHANGEABLE
Spacer,ring
Condor Pacific Industries, Inc.
5340-01-717-7602101498 INTERCHANGEABLE
Standoff,threaded,spacing
Naval Surface Warfare Center Dahlgren Div
Cross-Reference Index
Part NumberManufacturer
20T21 Enovation Controls Llc (USA)
101498 Dresser, Llc (USA)
10350060 Enovation Controls Llc (USA)
20T-250X4 Enovation Controls Llc (USA)
SR21W250 Enovation Controls Llc (USA)
120843 Dresser, Llc (USA)
C120843 Dresser, Llc (USA)
Related Parts
5905-00-106-9344INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
6685-00-524-9210INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
6685-00-677-7134INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
5930-00-955-9903INTERCHANGEABLE
SWITCH,THERMOSTATIC
20T21-26580
6685-00-977-4272INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
5865-01-101-5881INTERCHANGEABLE
MODULATOR,REFERENCE
6620-01-229-6478INTERCHANGEABLE
INDICATOR,ENGINE TEMPERATURE
5365-01-649-4588INTERCHANGEABLE
SPACER,RING
10149-8
5340-01-717-7602INTERCHANGEABLE
STANDOFF,THREADED,SPACING
101498

Frequently Asked Questions

What is NSN 6685-00-786-4050?

NSN 6685-00-786-4050 is a Thermometer,indicating,capillary, manufactured by Enovation Controls Llc, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-786-4050?

NSN 6685-00-786-4050 has 7 cross-referenced part numbers: 20T21 (Enovation Controls Llc), 101498 (Dresser, Llc), 10350060 (Enovation Controls Llc), 20T-250X4 (Enovation Controls Llc), SR21W250 (Enovation Controls Llc) and 2 more.

What NSN replaces 6685-00-786-4050?

There are 9 known substitutes for 6685-00-786-4050: 5905-00-106-9344, 6685-00-524-9210, 6685-00-677-7134 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20T21?

Key specifications for 20T21: Extension Neck Length: 0.750 INCHES NOMINAL IN; Case Diameter: 2.063 INCHES NOMINAL IN; Bulb Tip Length: 1.500 INCHES NOMINAL IN; Bulb Connection Type: THREADED. 22 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-786-4050 still in active supply?

NSN 6685-00-786-4050 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.
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