PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3681Indicator,humidity,plug

Clariant Corp Div Clariant Corporation · NSN 6685-01-047-1381 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-047-1381 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-047-1381. Primary manufacturer part number: 3681.
Features
  • Indicator,humidity,plug — FSC 6685
  • Desiccant Spot Humidity Percentage: 10.0 AND 20.0 AND 30.0
  • Material: ALUMINUM ALLOY 2017 AND ALUMINUM ALLOY 2024
  • End Connection Type: THREADED INTERNAL, PLAIN SINGLE END
  • Thread Quantity Per Inch: 14 SINGLE END
  • Thread Series Designator: NPT SINGLE END
  • Style Designator: PLUG
  • Nominal Thread Size: 0.750 INCHES SINGLE END IN
Applications
  • Applications requiring Aluminum Alloy 2017 and Aluminum Alloy 2024 construction
General Description

The Indicator,humidity,plug, cataloged under National Stock Number 6685-01-047-1381, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Clariant Corp Div Clariant Corporation. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-01-047-1381
Primary Part Number3681
Item NameIndicator,humidity,plug
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerClariant Corp Div Clariant Corporation
StatusACTIVE
Desiccant Spot Humidity Percentage10.0 AND 20.0 AND 30.0
MaterialALUMINUM ALLOY 2017 AND ALUMINUM ALLOY 2024
End Connection TypeTHREADED INTERNAL, PLAIN SINGLE END
Thread Quantity Per Inch14 SINGLE END
Thread Series DesignatorNPT SINGLE END
Style DesignatorPLUG
Nominal Thread Size0.750 INCHES SINGLE END IN
Width Across Flats1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND SINGLE END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6685-00-004-8970TYPEII INTERCHANGEABLE
Indicator,humidity,plug
Sae International Dba Sae International
3110-00-100-067514398P11 INTERCHANGEABLE
Cone and Rollers,tapered Roller
Taylor Machine Works Inc
5310-00-166-58823681 INTERCHANGEABLE
Washer,flat
Kidde Technologies, Inc Div Kidde Aerospace and Defense
5120-00-406-31815120-00-406-3181 INTERCHANGEABLE
Bit,screwdriver
General Services Administration Federal Supply Service
3120-00-585-4228HASB5 INTERCHANGEABLE
Bearing,plain,self-Aligning
U S Bearings
5355-00-701-2862368-1 INTERCHANGEABLE
Knob
Yosemite Investment Inc Dba North American Capacitor Co
6685-00-906-01568355883 INTERCHANGEABLE
Indicator,humidity,plug
U S Army Tank Automotive Command Amsta-Im-Mm
6685-01-038-6868 INTERCHANGEABLE
Indicator,humidity,plug
6685-01-081-7036SAE AS26860 INTERCHANGEABLE
Indicator,humidity,plug
Sae International Dba Sae International
6685-01-107-2622AS26860 TYPE I INTERCHANGEABLE
Indicator,humidity,plug
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
MIL-I-26860 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
3681 PRIMARY Clariant Corp Div Clariant Corporation (USA)
10175906 Us Army Aviation and Missile Command (USA)
680300-50 Clariant Corp Div Clariant Corporation (USA)
Related Parts
6685-00-004-8970INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
TYPEII
3110-00-100-0675INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
14398P11
5310-00-166-5882INTERCHANGEABLE
WASHER,FLAT
3681
5120-00-406-3181INTERCHANGEABLE
BIT,SCREWDRIVER
5120-00-406-3181
3120-00-585-4228INTERCHANGEABLE
BEARING,PLAIN,SELF-ALIGNING
HASB5
5355-00-701-2862INTERCHANGEABLE
KNOB
368-1
6685-00-906-0156INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
8355883
6685-01-038-6868INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
6685-01-081-7036INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
SAE AS26860
6685-01-107-2622INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
AS26860 TYPE I
6685-01-185-1246INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
AS26860
6685-01-251-1517INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
TA397-1383

Frequently Asked Questions

What is NSN 6685-01-047-1381?

NSN 6685-01-047-1381 is a Indicator,humidity,plug, manufactured by Clariant Corp Div Clariant Corporation, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-047-1381?

NSN 6685-01-047-1381 has 4 cross-referenced part numbers: MIL-I-26860 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 3681 (Clariant Corp Div Clariant Corporation), 10175906 (Us Army Aviation and Missile Command), 680300-50 (Clariant Corp Div Clariant Corporation).

What NSN replaces 6685-01-047-1381?

There are 12 known substitutes for 6685-01-047-1381: 6685-00-004-8970, 3110-00-100-0675, 5310-00-166-5882 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3681?

Key specifications for 3681: Desiccant Spot Humidity Percentage: 10.0 AND 20.0 AND 30.0; Material: ALUMINUM ALLOY 2017 AND ALUMINUM ALLOY 2024; End Connection Type: THREADED INTERNAL, PLAIN SINGLE END; Thread Quantity Per Inch: 14 SINGLE END. 10 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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