PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

G656-3Indicator,sight,liquid

Ldi Industries, Inc. Dba Ldi Industries Inc · NSN 6680-00-526-9023 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-526-9023 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-526-9023. Primary manufacturer part number: G656-3.
Features
  • Indicator,sight,liquid — FSC 6680
  • Overall Diameter: 0.688 INCHES NOMINAL IN
  • Thread Quantity Per Inch: UNABLE TO DECODE
  • Data Furnishing Method: CLEAR WINDOW
  • Material: COPPER ALLOY
  • Media for Which Designed: OIL
  • Features Provided: STEM TYPE COUPLING ADAPTER
  • Nominal Thread Size: UNABLE TO DECODE
Applications
  • Applications requiring Copper Alloy construction
General Description

The Indicator,sight,liquid, cataloged under National Stock Number 6680-00-526-9023, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ldi Industries, Inc. Dba Ldi Industries Inc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 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
NSN6680-00-526-9023
Primary Part NumberG656-3
Item NameIndicator,sight,liquid
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerLdi Industries, Inc. Dba Ldi Industries Inc
StatusCANCELLED
Overall Diameter0.688 INCHES NOMINAL IN
Thread Quantity Per InchUNABLE TO DECODE
Data Furnishing MethodCLEAR WINDOW
MaterialCOPPER ALLOY
Media for Which DesignedOIL
Features ProvidedSTEM TYPE COUPLING ADAPTER
Nominal Thread SizeUNABLE TO DECODE
Style DesignatorANGLE PATTERN, SHIELDED FRONT OPENING
Furnished DataLIQUID LEVEL
Thread Series DesignatorUNABLE TO DECODE
End Connection TypeUNABLE TO DECODE
Sight Height3.312 INCHES NOMINAL IN
Nominal Pipe Size for Which DesignedUNABLE TO DECODE
Thread DirectionUNABLE TO DECODE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3455-00-224-373210305 INTERCHANGEABLE
Cutter,milling,end
Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039
5133-00-266-9244 INTERCHANGEABLE
Drill,twist
2805-00-371-637615-421 INTERCHANGEABLE
Valve,poppet,engine
Dresser Industries Inc Leroi Div
3020-00-460-3269154-21 INTERCHANGEABLE
Gear,spur
Southern Gear & Machine Inc
6680-00-526-9019G656-2 INTERCHANGEABLE
Indicator,sight,liquid
Ldi Industries, Inc. Dba Ldi Industries Inc
4920-00-569-5084 INTERCHANGEABLE
Test Stand,aircraft Generator
5136-00-604-641115421 INTERCHANGEABLE
Die Head,hand
Curtis-Toledo, Inc.
5950-00-647-8287 INTERCHANGEABLE
Transformer,power
4520-01-043-6111 INTERCHANGEABLE
Support
2910-01-324-07034443461 INTERCHANGEABLE
Filter,fluid
Chrysler Corp Service and Parts Opns
Cross-Reference Index
Part NumberManufacturer
05-154-797-00-501 Allis-Chalmers Corp (USA)
15421 R and J Metal Fabricators Inc (USA)
G656-3 PRIMARY Ldi Industries, Inc. Dba Ldi Industries Inc (USA)
G656 Ldi Industries, Inc. Dba Ldi Industries Inc (USA)
18072 Apache Corp Gits Bros Mfg Co (USA)
Related Parts
3455-00-224-3732INTERCHANGEABLE
CUTTER,MILLING,END
10305
5133-00-266-9244INTERCHANGEABLE
DRILL,TWIST
2805-00-371-6376INTERCHANGEABLE
VALVE,POPPET,ENGINE
15-421
3020-00-460-3269INTERCHANGEABLE
GEAR,SPUR
154-21
6680-00-526-9019INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
G656-2
4920-00-569-5084INTERCHANGEABLE
TEST STAND,AIRCRAFT GENERATOR
5136-00-604-6411INTERCHANGEABLE
DIE HEAD,HAND
15421
5950-00-647-8287INTERCHANGEABLE
TRANSFORMER,POWER
4520-01-043-6111INTERCHANGEABLE
SUPPORT
2910-01-324-0703INTERCHANGEABLE
FILTER,FLUID
4443461
5950-01-414-6930INTERCHANGEABLE
COIL,RADIO FREQUENCY
15421
2090-01-571-2239INTERCHANGEABLE
THL CHAIR BACK

Frequently Asked Questions

What is NSN 6680-00-526-9023?

NSN 6680-00-526-9023 is a Indicator,sight,liquid, manufactured by Ldi Industries, Inc. Dba Ldi Industries Inc, classified under FSC 6680 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6680-00-526-9023?

NSN 6680-00-526-9023 has 5 cross-referenced part numbers: 05-154-797-00-501 (Allis-Chalmers Corp), 15421 (R and J Metal Fabricators Inc), G656-3 (Ldi Industries, Inc. Dba Ldi Industries Inc), G656 (Ldi Industries, Inc. Dba Ldi Industries Inc), 18072 (Apache Corp Gits Bros Mfg Co).

What NSN replaces 6680-00-526-9023?

There are 12 known substitutes for 6680-00-526-9023: 3455-00-224-3732, 5133-00-266-9244, 2805-00-371-6376 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of G656-3?

Key specifications for G656-3: Overall Diameter: 0.688 INCHES NOMINAL IN; Thread Quantity Per Inch: UNABLE TO DECODE; Data Furnishing Method: CLEAR WINDOW; Material: COPPER ALLOY. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6680-00-526-9023 still in active supply?

NSN 6680-00-526-9023 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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