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Technical Data Sheet
FIT221 3-8 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
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Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The INSULATION SLEEVING,ELECTRICAL is a the manufacturer industrial component. Key specifications include color: CLEAR, material: PLASTIC POLYTETRAFLUOROETHYLENE TUBE, flexibility: FLEXIBLE, temp_rating: -55.0 CELSIUS AND 135.0 CELSIUS SINGLE RESPONSE DEGC, overall_length: 4.000 INCHES NOMINAL IN, inside_diameter: 0.375 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5970-00-451-0976, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
FIT221 3-8
NSN: 5970-00-451-0976
FSC: 5970
CAGE: 92194 — BELDEN, INC. (USA)
SPECIFICATIONS
colorCLEAR
materialPLASTIC POLYTETRAFLUOROETHYLENE TUBE
flexibilityFLEXIBLE
temp_rating-55.0 CELSIUS AND 135.0 CELSIUS SINGLE RESPONSE DEGC
overall_length4.000 INCHES NOMINAL IN
inside_diameter0.375 INCHES NOMINAL IN
outside_diameter0.425 INCHES NOMINAL IN
style_designatorSHRINKABLE
environmental_protectionMILDEW RESISTANT
expanded_inside_diameter0.375 INCHES NOMINAL IN
inside_surface_conditionSMOOTH
minimum_tensile_strength2500 POUNDS PER SQUARE INCH LBS
NSN5970-00-451-0976
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available INSULATION SLEEVING,ELECTRICAL TITLE COMPONENT PN FIT221 3-8 MFR INSULATION SLEEVING,EL
KEY FEATURES
EXPANDED INSIDE DIAMETER: 0.375 INCHES NOMINAL IN
STYLE DESIGNATOR: SHRINKABLE
RECOVERED INSIDE DIAMETER: 0.187 INCHES NOMINAL IN
COLOR: CLEAR
RECOVERED WALL THICKNESS: 0.025 INCHES NOMINAL IN
FLEXIBILITY: FLEXIBLE
ENVIRONMENTAL PROTECTION: MILDEW RESISTANT
DIELECTRIC WITHSTANDING VOLTAGE IN VOLTS: 500.0
TECHNICAL CHARACTERISTICS (FLIS)
EXPANDED INSIDE DIAMETER0.375 INCHES NOMINAL IN
STYLE DESIGNATORSHRINKABLE
RECOVERED INSIDE DIAMETER0.187 INCHES NOMINAL IN
COLORCLEAR
RECOVERED WALL THICKNESS0.025 INCHES NOMINAL IN
FLEXIBILITYFLEXIBLE
ENVIRONMENTAL PROTECTIONMILDEW RESISTANT
DIELECTRIC WITHSTANDING VOLTAGE IN VOLTS500.0
TEMP RATING-67.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
OVERALL LENGTH4.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
91589Interchangeable
interchangeable cross-reference
interchangeable
1559AS198-1Interchangeable
interchangeable cross-reference
interchangeable
CLASS2Interchangeable
interchangeable cross-reference
interchangeable
14392-002Interchangeable
interchangeable cross-reference
interchangeable
MIL-I-23053/5Interchangeable
interchangeable cross-reference
interchangeable
FIT-221 1/16Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FIT221 3-8?
FIT221 3-8 is a INSULATION SLEEVING,ELECTRICAL.
What parts can replace FIT221 3-8?
There are 18 known substitutes for FIT221 3-8: 91589, 1559AS198-1, CLASS2 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FIT221 3-8?
FIT221 3-8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5970-00-451-0976. This indicates validated use in U.S. government and defense supply chains.
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