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JC491 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The DISK,CLUTCH,VEHICULAR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, pin_diameter: 0.125 INCHES NOMINAL IN, overall_length: 6.375 INCHES NOMINAL IN, opening_diameter: 0.750 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN, style_designator: ADJUSTABLE PIN, surface_treatment: OXIDE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-01-428-5017, 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
JC491
NSN: 5120-01-428-5017
FSC: 5120
CAGE: 1CV05 — THE STANLEY WORKS DBA STANLEY PROTO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
pin_diameter0.125 INCHES NOMINAL IN
overall_length6.375 INCHES NOMINAL IN
opening_diameter0.750 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
style_designatorADJUSTABLE PIN
surface_treatmentOXIDE OVERALL
nondefinitive_spec/std_data2 TYPE AND 2 CLASS
specification/standard_data0U583-SAE AS6018 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN5120-01-428-5017
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available DISK,CLUTCH,VEHICULAR TITLE COMPONENT PN JC491 MFR DISK,CLUTCH,VEHICULAR
KEY FEATURES
•
STYLE DESIGNATOR: ADJUSTABLE PIN
•
SURFACE TREATMENT: OXIDE OVERALL
•
MATERIAL: STEEL OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 2 CLASS
•
SPECIFICATION/STANDARD DATA: 0U583-SAE AS6018 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
PIN DIAMETER: 0.125 INCHES NOMINAL IN
•
OPENING DIAMETER: 0.750 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH6.375 INCHES NOMINAL IN
STYLE DESIGNATORADJUSTABLE PIN
SURFACE TREATMENTOXIDE OVERALL
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 2 CLASS
SPECIFICATION/STANDARD DATA0U583-SAE AS6018 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
PIN DIAMETER0.125 INCHES NOMINAL IN
OPENING DIAMETER0.750 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
AS6018 TY2CL2Interchangeable
interchangeable cross-reference
interchangeable
39-4685Interchangeable
interchangeable cross-reference
interchangeable
0-472AInterchangeable
interchangeable cross-reference
interchangeable
AS6018Interchangeable
interchangeable cross-reference
interchangeable
131551-1Interchangeable
interchangeable cross-reference
interchangeable
JC497Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is JC491?
JC491 is a DISK,CLUTCH,VEHICULAR.
What parts can replace JC491?
There are 20 known substitutes for JC491: AS6018 TY2CL2, 39-4685, 0-472A and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for JC491?
JC491 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-01-428-5017. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026