PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

55-1-1/2Indicator,sight,liquid

Kaydon Custom Filtration Corporation · NSN 6680-00-235-6017 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-235-6017 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-235-6017. Primary manufacturer part number: 55-1-1/2.
Features
  • Indicator,sight,liquid — FSC 6680
  • Thread Direction: UNABLE TO DECODE
  • Nominal Thread Size: UNABLE TO DECODE
  • Thread Quantity Per Inch: UNABLE TO DECODE
  • End Connection Type: UNABLE TO DECODE
  • Material: COPPER ALLOY
  • Media for Which Designed: ANY ACCEPTABLE
  • Style Designator: DOUBLE PORT
Applications
  • Applications requiring Copper Alloy construction
General Description

The Indicator,sight,liquid, cataloged under National Stock Number 6680-00-235-6017, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Kaydon Custom Filtration Corporation. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 42 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6680-00-235-6017
Primary Part Number55-1-1/2
Item NameIndicator,sight,liquid
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerKaydon Custom Filtration Corporation
StatusCANCELLED
Thread DirectionUNABLE TO DECODE
Nominal Thread SizeUNABLE TO DECODE
Thread Quantity Per InchUNABLE TO DECODE
End Connection TypeUNABLE TO DECODE
MaterialCOPPER ALLOY
Media for Which DesignedANY ACCEPTABLE
Style DesignatorDOUBLE PORT
Thread Series DesignatorUNABLE TO DECODE
Data Furnishing MethodCLEAR WINDOW
Sight Diameter2.750 INCHES NOMINAL IN
Nominal Pipe Size for Which DesignedUNABLE TO DECODE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
6605-00-319-559387877 INTERCHANGEABLE
Cover,pelorus Stand
Northrop Grumman Systems Corporation
5330-00-391-875755112 INTERCHANGEABLE
Gasket
C & D Equipment Company, Inc.
5310-00-596-90205511-2 INTERCHANGEABLE
Nut,plain,hexagon
Triumph Controls, Llc Dba Triumph Controls, Llc
5950-00-645-288255112 INTERCHANGEABLE
Coil,radio Frequency
L3harris Technologies, Inc Div Space & Airborne Systems
4730-00-852-8758FIG1742-100 INTERCHANGEABLE
Union,pipe
Flagg Stanley G & Co Inc Dba Flagg Brass
5120-01-036-9220 INTERCHANGEABLE
Contact Positioner,terminal Crim
4720-01-320-373955112-8-0330 INTERCHANGEABLE
Hose Assembly,nonmetallic
Hydraflow
Cross-Reference Index
Part NumberManufacturer
282-4501-801805REVFPCF40 Naval Ship Systems Command (USA)
E8643APC55-1 1-2 Kaydon Custom Filtration Corporation (USA)
565-4105-1016997ALTIPC5SH1 Naval Ship Systems Command (USA)
98909-6301-657166PC25 Naval Ship Systems Command (USA)
N68-25-008APC186 Ecolaire Inc Baldwin-Hamilton Co Div (USA)
98909-6301-657208PC19 Naval Ship Systems Command (USA)
403-4501-985249ALT6PCF40 Naval Ship Systems Command (USA)
418-4105-471945PC23SH1 Curtiss-Wright Controls, Inc. Div Actuation Division (USA)
565-4105-1016997ALT1PC70SH1 Naval Ship Systems Command (USA)
60-25-565 Ecolaire Inc Baldwin-Hamilton Co Div (USA)
WW8679221PC23SH1 General Electric Company (USA)
F1110-6PC21 Elliott Company Div Jeannette (USA)
WW8679220PC23SH1 General Electric Company (USA)
G386ITEM9SH1 Elliott Company Div Jeannette (USA)
98913-6301-414539PC30 Naval Ship Systems Command (USA)
55-1-1/2 PRIMARY Kaydon Custom Filtration Corporation (USA)
G80PC19 Elliott Company Div Jeannette (USA)
98913-6301-1081502PC42 Naval Ship Systems Command (USA)
565-4105-1016997ALT1PC42SH1 Naval Ship Systems Command (USA)
WW8679270PC9SH1 General Electric Company (USA)
Related Parts
6605-00-319-5593INTERCHANGEABLE
COVER,PELORUS STAND
87877
5330-00-391-8757INTERCHANGEABLE
GASKET
55112
5310-00-596-9020INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5511-2
5950-00-645-2882INTERCHANGEABLE
COIL,RADIO FREQUENCY
55112
4730-00-852-8758INTERCHANGEABLE
UNION,PIPE
FIG1742-100
5120-01-036-9220INTERCHANGEABLE
CONTACT POSITIONER,TERMINAL CRIM
4720-01-320-3739INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
55112-8-0330

Frequently Asked Questions

What is NSN 6680-00-235-6017?

NSN 6680-00-235-6017 is a Indicator,sight,liquid, manufactured by Kaydon Custom Filtration Corporation, classified under FSC 6680 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6680-00-235-6017?

NSN 6680-00-235-6017 has 42 cross-referenced part numbers: 282-4501-801805REVFPCF40 (Naval Ship Systems Command), E8643APC55-1 1-2 (Kaydon Custom Filtration Corporation), 565-4105-1016997ALTIPC5SH1 (Naval Ship Systems Command), 98909-6301-657166PC25 (Naval Ship Systems Command), N68-25-008APC186 (Ecolaire Inc Baldwin-Hamilton Co Div) and 37 more.

What NSN replaces 6680-00-235-6017?

There are 7 known substitutes for 6680-00-235-6017: 6605-00-319-5593, 5330-00-391-8757, 5310-00-596-9020 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 55-1-1/2?

Key specifications for 55-1-1/2: Thread Direction: UNABLE TO DECODE; Nominal Thread Size: UNABLE TO DECODE; Thread Quantity Per Inch: UNABLE TO DECODE; End Connection Type: UNABLE TO DECODE. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6680-00-235-6017 still in active supply?

NSN 6680-00-235-6017 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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