PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M1-3BIndicator,sight,liquid

Henry Technologies, Inc. · NSN 6680-01-279-5081 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-01-279-5081 — this item is cataloged by the U.S. Government under National Stock Number 6680-01-279-5081. Primary manufacturer part number: M1-3B.
Features
  • Indicator,sight,liquid — FSC 6680
  • Data Furnishing Method: CLEAR WINDOW AND INSCRIBED DRY-WET
  • Media for Which Designed: WATER
  • Furnished Data: EXCESS MOISTURE CONTENT
  • 4 verified cross-references
  • Primary manufacturer: Henry Technologies, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-279-5081, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Henry Technologies, Inc.. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 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
NSN6680-01-279-5081
Primary Part NumberM1-3B
Item NameIndicator,sight,liquid
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerHenry Technologies, Inc.
StatusACTIVE
Data Furnishing MethodCLEAR WINDOW AND INSCRIBED DRY-WET
Media for Which DesignedWATER
Furnished DataEXCESS MOISTURE CONTENT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
6685-01-051-0036 INTERCHANGEABLE
Indicator,humidity,plug
5965-01-391-949278A4135 INTERCHANGEABLE
Microphone Element
Gentex Corporation
Cross-Reference Index
Part NumberManufacturer
M1-3B Henry Technologies, Inc. (USA)
GLS00050 Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters (USA)
GLS-50 Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters (USA)
X15030021 Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters (USA)
Related Parts
6685-01-051-0036INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
5965-01-391-9492INTERCHANGEABLE
MICROPHONE ELEMENT
78A4135

Frequently Asked Questions

What is NSN 6680-01-279-5081?

NSN 6680-01-279-5081 is a Indicator,sight,liquid, manufactured by Henry Technologies, Inc., classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-01-279-5081?

NSN 6680-01-279-5081 has 4 cross-referenced part numbers: M1-3B (Henry Technologies, Inc.), GLS00050 (Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters), GLS-50 (Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters), X15030021 (Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters).

What NSN replaces 6680-01-279-5081?

There are 2 known substitutes for 6680-01-279-5081: 6685-01-051-0036, 5965-01-391-9492. Verify interchangeability with system specifications before substitution.

What are the specifications of M1-3B?

Key specifications for M1-3B: Data Furnishing Method: CLEAR WINDOW AND INSCRIBED DRY-WET; Media for Which Designed: WATER; Furnished Data: EXCESS MOISTURE CONTENT; Special Features: PROTECTION CAP. 4 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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