PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20550Thermometer,self-Indicating

H-B Instrument Co · NSN 6685-00-696-2418 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-696-2418 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-696-2418. Primary manufacturer part number: 20550.
Features
  • Thermometer,self-Indicating — FSC 6685
  • Actuating Medium: MERCURY
  • Scale Type: ENCLOSED GLASS
  • Design Type: FLUCTUATING
  • 1 verified cross-reference
  • Primary manufacturer: H-B Instrument Co
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Thermometer,self-Indicating, cataloged under National Stock Number 6685-00-696-2418, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is H-B Instrument Co. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-696-2418
Primary Part Number20550
Item NameThermometer,self-Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerH-B Instrument Co
StatusACTIVE
Actuating MediumMERCURY
Scale TypeENCLOSED GLASS
Design TypeFLUCTUATING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
1680-00-074-194920550 INTERCHANGEABLE
Shaft Assembly,flexible
Transdigm Inc
2920-00-118-55331287375H91 INTERCHANGEABLE
Generator,engine Accessory
Dressta North America Ltd
5365-00-386-456725870 INTERCHANGEABLE
Bushing,oil Pressure
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
7310-00-474-589320551 INTERCHANGEABLE
Compartment Vent,steam Cooker
Cleveland Range, Llc
5999-00-549-5570569-021-010-000 INTERCHANGEABLE
Contact,electrical
Roanwell, Llc
5985-00-719-9944MX-2400/ARM-35 INTERCHANGEABLE
Tuner,transmission Line
Joint Electronics Type Designation System
6130-00-986-823320550 INTERCHANGEABLE
Power Supply
Senior Operations Llc Div Senior Aerospace Ketema
4820-01-311-1623CPC10-15-1 INTERCHANGEABLE
Valve,check
Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division
5331-01-340-685520550 INTERCHANGEABLE
O-Ring
Allied Systems Company Dba Allied Systems Co
5310-01-353-2674 INTERCHANGEABLE
Washer,bevel
Cross-Reference Index
Part NumberManufacturer
20550 PRIMARY H-B Instrument Co (USA)
Related Parts
1680-00-074-1949INTERCHANGEABLE
SHAFT ASSEMBLY,FLEXIBLE
20550
2920-00-118-5533INTERCHANGEABLE
GENERATOR,ENGINE ACCESSORY
1287375H91
5365-00-386-4567INTERCHANGEABLE
BUSHING,OIL PRESSURE
25870
7310-00-474-5893INTERCHANGEABLE
COMPARTMENT VENT,STEAM COOKER
20551
5999-00-549-5570INTERCHANGEABLE
CONTACT,ELECTRICAL
569-021-010-000
5985-00-719-9944INTERCHANGEABLE
TUNER,TRANSMISSION LINE
MX-2400/ARM-35
6130-00-986-8233INTERCHANGEABLE
POWER SUPPLY
20550
4820-01-311-1623INTERCHANGEABLE
VALVE,CHECK
CPC10-15-1
5331-01-340-6855INTERCHANGEABLE
O-RING
20550
5310-01-353-2674INTERCHANGEABLE
WASHER,BEVEL
5120-01-430-8107INTERCHANGEABLE
CROWFOOT ATTACHMENT,SOCKET WRENC

Frequently Asked Questions

What is NSN 6685-00-696-2418?

NSN 6685-00-696-2418 is a Thermometer,self-Indicating, manufactured by H-B Instrument Co, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-696-2418?

NSN 6685-00-696-2418 has 1 cross-referenced part number: 20550 (H-B Instrument Co).

What NSN replaces 6685-00-696-2418?

There are 11 known substitutes for 6685-00-696-2418: 1680-00-074-1949, 2920-00-118-5533, 5365-00-386-4567 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20550?

Key specifications for 20550: Actuating Medium: MERCURY; Scale Type: ENCLOSED GLASS; Design Type: FLUCTUATING. 3 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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