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PartsTable / COMPONENT / 3D8749
3D8749 ✓ 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 GUARD,MECHANICAL DRIVE is a the manufacturer industrial component. Key specifications include shape: STRAIGHT, length: 1.500 INCHES NOMINAL IN, diameter: 0.250 INCHES NOMINAL IN, material: COPPER ALLOY OVERALL, unit_type: SCREWDRIVER, head_style: HEADLESS (SETSCREW). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3020-01-181-8557, 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
3D8749
NSN: 3020-01-181-8557
FSC: 3020
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
shapeSTRAIGHT
length1.500 INCHES NOMINAL IN
diameter0.250 INCHES NOMINAL IN
materialCOPPER ALLOY OVERALL
unit_typeSCREWDRIVER
head_styleHEADLESS (SETSCREW)
point_styleCONE
thread_size7/16-20
point_length0.031 INCHES NOMINAL IN
thread_class3A A
overall_width19.5 INCHES NOMINAL IN
thread_length0.188 INCHES MAXIMUM IN
NSN3020-01-181-8557
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GUARD,MECHANICAL DRIVE TITLE COMPONENT PN 3D8749 MFR GUARD,MECHANICAL DRIVE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
AA51146B-1A22BInterchangeable
interchangeable cross-reference
interchangeable
8195Interchangeable
interchangeable cross-reference
interchangeable
LL-A-MInterchangeable
interchangeable cross-reference
interchangeable
138Interchangeable
interchangeable cross-reference
interchangeable
156Interchangeable
interchangeable cross-reference
interchangeable
8195-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3D8749?
3D8749 is a GUARD,MECHANICAL DRIVE.
What parts can replace 3D8749?
There are 8 known substitutes for 3D8749: AA51146B-1A22B, 8195, LL-A-M and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3D8749?
3D8749 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3020-01-181-8557. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026