PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

75756-1Indicator,humidity,plug

Triumph Thermal Systems - Maryland, Inc. · NSN 6685-00-618-1822 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-618-1822 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-618-1822. Primary manufacturer part number: 75756-1.
Features
  • Indicator,humidity,plug — FSC 6685
  • Style Designator: PLUG
  • End Connection Type: THREADED EXTERNAL, PLAIN SINGLE END
  • Desiccant Spot Humidity Percentage: 40.0
  • Nondefinitive Spec/std Data: II TYPE
  • Material: COPPER ALLOY
  • Specification/standard Data: 81343-SAE AS26860 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Width Across Flats: 1.375 INCHES NOMINAL IN
Applications
  • Applications requiring Copper Alloy construction
General Description

The Indicator,humidity,plug, cataloged under National Stock Number 6685-00-618-1822, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Triumph Thermal Systems - Maryland, Inc.. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 11 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
NSN6685-00-618-1822
Primary Part Number75756-1
Item NameIndicator,humidity,plug
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerTriumph Thermal Systems - Maryland, Inc.
StatusCANCELLED
Style DesignatorPLUG
End Connection TypeTHREADED EXTERNAL, PLAIN SINGLE END
Desiccant Spot Humidity Percentage40.0
Nondefinitive Spec/std DataII TYPE
MaterialCOPPER ALLOY
Specification/standard Data81343-SAE AS26860 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Width Across Flats1.375 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6685-00-004-8970TYPEII INTERCHANGEABLE
Indicator,humidity,plug
Sae International Dba Sae International
1420-00-013-70661617823 INTERCHANGEABLE
Valve
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5310-00-042-4229MS35333-113 INTERCHANGEABLE
Washer,lock
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5331-00-166-84002-155V0747-75 INTERCHANGEABLE
O-Ring
Parker-Hannifin Corp Div O-Ring Division
3030-00-169-44322-155 INTERCHANGEABLE
Belt,round
Parker-Hannifin Corp Div O-Ring Division
5310-00-197-884421-55 INTERCHANGEABLE
Washer,flat
Brp Us Inc
6220-00-226-95642155 INTERCHANGEABLE
Light Assy
Mission Systems Davenport Inc.
3940-00-298-3985 INTERCHANGEABLE
Sling,cargo,paulin
6685-00-464-4660AS18013-3 INTERCHANGEABLE
Indicator,humidity,plug
Sae International Dba Sae International
5310-00-485-93532-155 INTERCHANGEABLE
Washer,flat
Amphenol Corp Div Amphenol Aerospace Operations
Cross-Reference Index
Part NumberManufacturer
AS26860 Society of Automotive Engineers Inc (USA)
X00181 Mbda Uk Ltd (GBR)
IV55324 Herrmann, Gebr. (DEU)
6660PL0824151 Jednolity Indeks Materialowy - Uniform Material Index (POL)
6685006181822 E.c.a Etablissement Centrald'approvisionnement Des Forces Armee
75756-1 PRIMARY Triumph Thermal Systems - Maryland, Inc. (USA)
AS26860 Sae International Dba Sae International (USA)
AS18013 Sae International Dba Sae International (USA)
TYPE II Society of Automotive Engineers Inc (USA)
AS18013 Society of Automotive Engineers Inc (USA)
2510127 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
9129386 Us Army Aviation and Missile Command (USA)
10055493 Nimikkeistokeskus Ncb Finland (FIN)
2155 Clariant Corp Div Clariant Corporation (USA)
Related Parts
6685-00-004-8970INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
TYPEII
1420-00-013-7066INTERCHANGEABLE
VALVE
1617823
5310-00-042-4229INTERCHANGEABLE
WASHER,LOCK
MS35333-113
5331-00-166-8400INTERCHANGEABLE
O-RING
2-155V0747-75
3030-00-169-4432INTERCHANGEABLE
BELT,ROUND
2-155
5310-00-197-8844INTERCHANGEABLE
WASHER,FLAT
21-55
6220-00-226-9564INTERCHANGEABLE
LIGHT ASSY
2155
3940-00-298-3985INTERCHANGEABLE
SLING,CARGO,PAULIN
6685-00-464-4660INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
AS18013-3
5310-00-485-9353INTERCHANGEABLE
WASHER,FLAT
2-155
4810-00-541-6051INTERCHANGEABLE
VALVE,GATE
215-5
5310-00-550-1130INTERCHANGEABLE
WASHER,LOCK
MS35333-40

Frequently Asked Questions

What is NSN 6685-00-618-1822?

NSN 6685-00-618-1822 is a Indicator,humidity,plug, manufactured by Triumph Thermal Systems - Maryland, Inc., classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-618-1822?

NSN 6685-00-618-1822 has 14 cross-referenced part numbers: AS26860 (Society of Automotive Engineers Inc), X00181 (Mbda Uk Ltd), IV55324 (Herrmann, Gebr.), 6660PL0824151 (Jednolity Indeks Materialowy - Uniform Material Index), 6685006181822 (E.c.a Etablissement Centrald'approvisionnement Des Forces Armee) and 9 more.

What NSN replaces 6685-00-618-1822?

There are 12 known substitutes for 6685-00-618-1822: 6685-00-004-8970, 1420-00-013-7066, 5310-00-042-4229 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 75756-1?

Key specifications for 75756-1: Special Features: SLANTING GASKET SEAT; Style Designator: PLUG; End Connection Type: THREADED EXTERNAL, PLAIN SINGLE END; Desiccant Spot Humidity Percentage: 40.0. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-618-1822 still in active supply?

NSN 6685-00-618-1822 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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