PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

58FMSThermometer,indicating,capillary

Bellofram Corporation · NSN 6685-00-542-0924 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-542-0924 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-542-0924. Primary manufacturer part number: 58FMS.
Features
  • Thermometer,indicating,capillary — FSC 6685
  • Mounting Bolt Circle Diameter: 4.250 INCHES NOMINAL IN
  • Bulb Connection Type: UNION
  • Dial Diameter: 3.500 INCHES NOMINAL IN
  • Features Provided: ZERO ADJUSTMENT AND INCANDESCENT LAMP
  • Scale Inscription/background Color: BLACK FIGURES ON WHITE BACKGROUND,MAJOR GRADUATIONS RED
  • Bulb Overall Length: 10.000 INCHES NOMINAL IN
  • Material: IRON METER CASE
Applications
  • Applications requiring Iron Meter Case construction
General Description

The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-00-542-0924, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Bellofram Corporation. Government technical data includes 25 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-542-0924
Primary Part Number58FMS
Item NameThermometer,indicating,capillary
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerBellofram Corporation
StatusACTIVE
Mounting Bolt Circle Diameter4.250 INCHES NOMINAL IN
Bulb Connection TypeUNION
Dial Diameter3.500 INCHES NOMINAL IN
Features ProvidedZERO ADJUSTMENT AND INCANDESCENT LAMP
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND,MAJOR GRADUATIONS RED
Bulb Overall Length10.000 INCHES NOMINAL IN
MaterialIRON METER CASE
Reference Number Differentiating CharacteristicsCSYG,BKCN,ATEQ,ASSP,AWAG,BGKZ,BKCT,BKCW,BKCX,BKCY,BKCZ,CSYH,MATT,BLQG,BHMC,AXHR,AFFL,AEBV,FEAT
MaterialCOPPER BULB
Active Portion Diameter0.563 INCHES NOMINAL IN
Scale TypeCONCENTRIC DIAL
Scale Accuracy Rating1 PCT
Case Diameter4.906 INCHES NOMINAL IN
Actuating MediumMETHYL CHLORIDE
Pointer/pen Type and Quantity1 INDICATING SINGLE
Scale Smallest Increment5.0 DEG FAHRENHEIT
Scale Measurement Range-20.000 TO 240.000 DEG FAHRENHEIT
Bulb TypePLAIN RIGID
Indicator Connection MethodFLEXIBLE TUBE
Unthreaded Mounting Hole Diameter0.219 INCHES NOMINAL IN
Mounting Facility Type and Quantity1 FLUSH AND 3 HOLE
Case TypeVAPORPROOF
Active Portion Length9.625 INCHES NOMINAL IN
Flexible Tube Length72.000 INCHES NOMINAL IN
Bulb Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6685-00-983-278158FMS INTERCHANGEABLE
Thermometer,indicating,capillary
Bellofram Corporation
Cross-Reference Index
Part NumberManufacturer
58FMS Bellofram Corporation (USA)
58FMF Bellofram Corporation (USA)
XF58-10 Bellofram Corporation (USA)
58FMF Desco Corp Marsh Bellofram Div (USA)
XF58-10 Desco Corp Marsh Bellofram Div (USA)
58FMS Desco Corp Marsh Bellofram Div (USA)
Related Parts
6685-00-983-2781INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
58FMS

Frequently Asked Questions

What is NSN 6685-00-542-0924?

NSN 6685-00-542-0924 is a Thermometer,indicating,capillary, manufactured by Bellofram Corporation, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-542-0924?

NSN 6685-00-542-0924 has 6 cross-referenced part numbers: 58FMS (Bellofram Corporation), 58FMF (Bellofram Corporation), XF58-10 (Bellofram Corporation), 58FMF (Desco Corp Marsh Bellofram Div), XF58-10 (Desco Corp Marsh Bellofram Div) and 1 more.

What NSN replaces 6685-00-542-0924?

There is 1 known substitute for 6685-00-542-0924: 6685-00-983-2781. Verify interchangeability with system specifications before substitution.

What are the specifications of 58FMS?

Key specifications for 58FMS: Mounting Bolt Circle Diameter: 4.250 INCHES NOMINAL IN; Bulb Connection Type: UNION; Dial Diameter: 3.500 INCHES NOMINAL IN; Features Provided: ZERO ADJUSTMENT AND INCANDESCENT LAMP. 27 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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