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Technical Data Sheet
PartsTable / COMPONENT / 221SJ18
221SJ18 ✓ 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 SEMICONDUCTOR DEVICE,DIODE is a the manufacturer industrial component. Key specifications include width: 2.000 INCHES NOMINAL IN, material: ASBESTOS FRICTION LINING, thickness: 0.250 INCHES NOMINAL IN, lining_style: CLUTCH DISK SEGMENT, minor_radius: 4.375 INCHES NOMINAL IN, application_type: DRY. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2530-00-521-4662, 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
221SJ18
NSN: 2530-00-521-4662
FSC: 2530
CAGE: 76040 — MACK TRUCKS INC PARTS OPN (USA)
SPECIFICATIONS
width2.000 INCHES NOMINAL IN
materialASBESTOS FRICTION LINING
thickness0.250 INCHES NOMINAL IN
lining_styleCLUTCH DISK SEGMENT
minor_radius4.375 INCHES NOMINAL IN
application_typeDRY
attachment_methodRIVETED
features_providedRIGID FRICTION LINING
fabrication_methodCOMPRESSED
hole_arrangement_styleDOUBLE EVEN
hole_type_and_quantity8 COUNTERBORED
NSN2530-00-521-4662
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SEMICONDUCTOR DEVICE,DIODE TITLE COMPONENT PN 221SJ18 MFR SEMICONDUCTOR DEVICE,D
KEY FEATURES
•
THICKNESS: 0.250 INCHES NOMINAL IN
•
FABRICATION METHOD: COMPRESSED
•
FEATURES PROVIDED: RIGID FRICTION LINING
•
MINOR RADIUS: 4.375 INCHES NOMINAL IN
•
ATTACHMENT METHOD: RIVETED
•
HOLE TYPE AND QUANTITY: 8 COUNTERBORED
•
LINING STYLE: CLUTCH DISK SEGMENT
•
APPLICATION TYPE: DRY
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.250 INCHES NOMINAL IN
FABRICATION METHODCOMPRESSED
FEATURES PROVIDEDRIGID FRICTION LINING
MINOR RADIUS4.375 INCHES NOMINAL IN
ATTACHMENT METHODRIVETED
HOLE TYPE AND QUANTITY8 COUNTERBORED
LINING STYLECLUTCH DISK SEGMENT
APPLICATION TYPEDRY
MATERIALASBESTOS FRICTION LINING
WIDTH2.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
SL4881PC43Interchangeable
interchangeable cross-reference
interchangeable
SL8807PC7Interchangeable
interchangeable cross-reference
interchangeable
029438-00Interchangeable
interchangeable cross-reference
interchangeable
40807Interchangeable
interchangeable cross-reference
interchangeable
985329-421Interchangeable
interchangeable cross-reference
interchangeable
40142Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 221SJ18?
221SJ18 is a SEMICONDUCTOR DEVICE,DIODE.
What parts can replace 221SJ18?
There are 15 known substitutes for 221SJ18: SL4881PC43, SL8807PC7, 029438-00 and 12 more. Substitute compatibility should be verified for your specific system.
Is 221SJ18 still available?
221SJ18 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026