PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

G-435 PC 18-X-3Thermowell

Honeywell Inc Process Control Div · NSN 6685-01-234-7127 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-234-7127 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-234-7127. Primary manufacturer part number: G-435 PC 18-X-3.
Features
  • Thermowell — FSC 6685
  • Style Designator: THREADED STEPPED SHANK
  • Criticality Code Justification: ZZZY
  • Bulb Tip Length: 3.000 INCHES NOMINAL IN
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS.
  • Material: COPPER ALLOY
  • Internal Thread Size: 1/2 IN.NPT ALL BORES IN
  • 3 verified cross-references
Applications
  • Applications requiring Copper Alloy construction
General Description

The Thermowell, cataloged under National Stock Number 6685-01-234-7127, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Honeywell Inc Process Control Div. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-01-234-7127
Primary Part NumberG-435 PC 18-X-3
Item NameThermowell
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerHoneywell Inc Process Control Div
StatusACTIVE
Style DesignatorTHREADED STEPPED SHANK
Criticality Code JustificationZZZY
Bulb Tip Length3.000 INCHES NOMINAL IN
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS.
MaterialCOPPER ALLOY
Internal Thread Size1/2 IN.NPT ALL BORES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5930-00-763-845712483 INTERCHANGEABLE
Switch,push
Giga-Tronics Incorporated Dba Giga-Tronics
6685-01-237-7992 INTERCHANGEABLE
Thermocouple,heating Element
6685-01-237-7993 INTERCHANGEABLE
Thermocouple,heating Element
5220-01-594-9308G435 INTERCHANGEABLE
Gage,plug,plain Cylindrical
Daniels Manufacturing Corporation
5110-01-670-9836 INTERCHANGEABLE
Chisel,brick
Cross-Reference Index
Part NumberManufacturer
G-435 PC 18-X-3 Honeywell Inc Process Control Div (USA)
G-435 Honeywell Inc Process Control Div (USA)
10-R-31-39-X-3 Honeywell Inc Process Control Div (USA)
Related Parts
5930-00-763-8457INTERCHANGEABLE
SWITCH,PUSH
12483
6685-01-237-7992INTERCHANGEABLE
THERMOCOUPLE,HEATING ELEMENT
6685-01-237-7993INTERCHANGEABLE
THERMOCOUPLE,HEATING ELEMENT
5220-01-594-9308INTERCHANGEABLE
GAGE,PLUG,PLAIN CYLINDRICAL
G435
5110-01-670-9836INTERCHANGEABLE
CHISEL,BRICK

Frequently Asked Questions

What is NSN 6685-01-234-7127?

NSN 6685-01-234-7127 is a Thermowell, manufactured by Honeywell Inc Process Control Div, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-234-7127?

NSN 6685-01-234-7127 has 3 cross-referenced part numbers: G-435 PC 18-X-3 (Honeywell Inc Process Control Div), G-435 (Honeywell Inc Process Control Div), 10-R-31-39-X-3 (Honeywell Inc Process Control Div).

What NSN replaces 6685-01-234-7127?

There are 5 known substitutes for 6685-01-234-7127: 5930-00-763-8457, 6685-01-237-7992, 6685-01-237-7993 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of G-435 PC 18-X-3?

Key specifications for G-435 PC 18-X-3: Style Designator: THREADED STEPPED SHANK; Criticality Code Justification: ZZZY; Bulb Tip Length: 3.000 INCHES NOMINAL IN; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS.. 6 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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