PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25194Glass,liquid Sight Indicator,rou

Itw Gse Inc. · NSN 6680-01-539-8591 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-01-539-8591 — this item is cataloged by the U.S. Government under National Stock Number 6680-01-539-8591. Primary manufacturer part number: 25194.
Features
  • Glass,liquid Sight Indicator,rou — FSC 6680
  • 2 verified cross-references
  • Primary manufacturer: Itw Gse Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Glass,liquid Sight Indicator,rou, cataloged under National Stock Number 6680-01-539-8591, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Itw Gse Inc.. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6680-01-539-8591
Primary Part Number25194
Item NameGlass,liquid Sight Indicator,rou
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerItw Gse Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5950-00-085-0217CA4464 INTERCHANGEABLE
Transformer,power
U S Dept of Transportation Federal Aviation Administration
5133-00-228-1375 INTERCHANGEABLE
Drill,twist
5330-00-318-6177FE-2094 INTERCHANGEABLE
Gasket
Carlisle & Finch Co
3120-00-437-606325194 INTERCHANGEABLE
Bearing,sleeve
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5331-00-641-8282627 INTERCHANGEABLE
O-Ring
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
2915-00-837-9950 INTERCHANGEABLE
Valve Assembly,fuel
3950-01-194-799425194 INTERCHANGEABLE
Plates,brake
Twg Canada Consolidated Inc
1680-01-596-194025194 INTERCHANGEABLE
Housing,coupling
Parker Hannifin Corporation Div Hydraulic Systems Division
Cross-Reference Index
Part NumberManufacturer
25194 Itw Gse Inc. (USA)
25194 Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems (USA)
Related Parts
5950-00-085-0217INTERCHANGEABLE
TRANSFORMER,POWER
CA4464
5133-00-228-1375INTERCHANGEABLE
DRILL,TWIST
5330-00-318-6177INTERCHANGEABLE
GASKET
FE-2094
3120-00-437-6063INTERCHANGEABLE
BEARING,SLEEVE
25194
5331-00-641-8282INTERCHANGEABLE
O-RING
627
2915-00-837-9950INTERCHANGEABLE
VALVE ASSEMBLY,FUEL
3950-01-194-7994INTERCHANGEABLE
PLATES,BRAKE
25194
1680-01-596-1940INTERCHANGEABLE
HOUSING,COUPLING
25194

Frequently Asked Questions

What is NSN 6680-01-539-8591?

NSN 6680-01-539-8591 is a Glass,liquid Sight Indicator,rou, manufactured by Itw Gse Inc., classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-01-539-8591?

NSN 6680-01-539-8591 has 2 cross-referenced part numbers: 25194 (Itw Gse Inc.), 25194 (Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems).

What NSN replaces 6680-01-539-8591?

There are 8 known substitutes for 6680-01-539-8591: 5950-00-085-0217, 5133-00-228-1375, 5330-00-318-6177 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25194?

Key specifications for 25194: End Item Identification: F-22A RAPTOR A; Part Name Assigned by Controlling Agency: GLASS, SIGHT LIQUID. 2 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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