PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS3397-11Indicator,humidity,plug

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 6685-00-641-8526 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-641-8526 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-641-8526. Primary manufacturer part number: MS3397-11.
Features
  • Indicator,humidity,plug — FSC 6685
  • Minimum Desiccant Capacity: 20.0 GRAMS G
  • Thread Series Designator: UNEF SINGLE END
  • Features Provided: REFILLABLE
  • Nominal Thread Size: 1.000 INCHES SINGLE END IN
  • Thread Direction: RIGHT-HAND SINGLE END
  • 4 verified cross-references
  • Primary manufacturer: Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Indicator,humidity,plug, cataloged under National Stock Number 6685-00-641-8526, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-641-8526
Primary Part NumberMS3397-11
Item NameIndicator,humidity,plug
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Minimum Desiccant Capacity20.0 GRAMS G
Thread Series DesignatorUNEF SINGLE END
Features ProvidedREFILLABLE
Nominal Thread Size1.000 INCHES SINGLE END IN
Thread DirectionRIGHT-HAND SINGLE END
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5996-00-078-7515137777-04 INTERCHANGEABLE
Amplifier,audio Frequency
Ge Aviation Systems Llc
5310-00-252-40781178 INTERCHANGEABLE
Washer,flat
Wisconsin Motors, Llc
4820-00-258-1546 INTERCHANGEABLE
Cock,plug
4820-00-272-3353 INTERCHANGEABLE
Cock,plug
5120-00-277-8834 INTERCHANGEABLE
Wrench,box and Open End,combinat
5180-00-313-9496PD5180-00-313-9496 INTERCHANGEABLE
Puller Kit,universal
General Services Administration Federal Supply Service
5305-00-369-9312 INTERCHANGEABLE
Screw,machine
6145-00-669-6642 INTERCHANGEABLE
Wire,electrical
3120-00-776-0063117-8 INTERCHANGEABLE
Bushing,sleeve
Cm Manufacturing Inc Dba Cm Manufacturing Inc
5310-00-838-1490 INTERCHANGEABLE
Washer,lock
Cross-Reference Index
Part NumberManufacturer
MS3397-11 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
1178 Triumph Engine Control Systems Llc (USA)
79-5033G1 Raytheon Company Dba Raytheon Co (USA)
79-5033G1 Raytheon Company Div Corp (USA)
Related Parts
5996-00-078-7515INTERCHANGEABLE
AMPLIFIER,AUDIO FREQUENCY
137777-04
5310-00-252-4078INTERCHANGEABLE
WASHER,FLAT
1178
4820-00-258-1546INTERCHANGEABLE
COCK,PLUG
4820-00-272-3353INTERCHANGEABLE
COCK,PLUG
5120-00-277-8834INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
5180-00-313-9496INTERCHANGEABLE
PULLER KIT,UNIVERSAL
PD5180-00-313-9496
5305-00-369-9312INTERCHANGEABLE
SCREW,MACHINE
6145-00-669-6642INTERCHANGEABLE
WIRE,ELECTRICAL
3120-00-776-0063INTERCHANGEABLE
BUSHING,SLEEVE
117-8
5310-00-838-1490INTERCHANGEABLE
WASHER,LOCK
6240-01-025-9691INTERCHANGEABLE
LAMP,INCANDESCENT
1178
5355-01-149-8304INTERCHANGEABLE
CURSOR,INDICATOR
1178

Frequently Asked Questions

What is NSN 6685-00-641-8526?

NSN 6685-00-641-8526 is a Indicator,humidity,plug, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-641-8526?

NSN 6685-00-641-8526 has 4 cross-referenced part numbers: MS3397-11 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 1178 (Triumph Engine Control Systems Llc), 79-5033G1 (Raytheon Company Dba Raytheon Co), 79-5033G1 (Raytheon Company Div Corp).

What NSN replaces 6685-00-641-8526?

There are 12 known substitutes for 6685-00-641-8526: 5996-00-078-7515, 5310-00-252-4078, 4820-00-258-1546 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS3397-11?

Key specifications for MS3397-11: Minimum Desiccant Capacity: 20.0 GRAMS G; Thread Series Designator: UNEF SINGLE END; Features Provided: REFILLABLE; Nominal Thread Size: 1.000 INCHES SINGLE END IN. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-641-8526 still in active supply?

NSN 6685-00-641-8526 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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