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A678 ✓ 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 GEAR,SPUR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hardness_rating: 88.0 VICKERS MAXIMUM OVERALL, outside_diameter: 0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN, aperture_diameter: 0.712 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN, surface_treatment: ZINC OVERALL, cross-sectional_thickness: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM 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 3020-00-618-0086, 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
A678
NSN: 3020-00-618-0086
FSC: 3020
CAGE: 20049 — THE ELECTRIC TACHOMETER CORP. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hardness_rating88.0 VICKERS MAXIMUM OVERALL
outside_diameter0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
aperture_diameter0.712 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN
surface_treatmentZINC OVERALL
cross-sectional_thickness0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
NSN3020-00-618-0086
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GEAR,SPUR TITLE COMPONENT PN A678 MFR GEAR,SPUR
KEY FEATURES
•
BORE STYLE: PLAIN BOTH ENDS
•
BORE NOMINAL DIAMETER: 0.251 INCHES BOTH ENDS IN
•
BODY STYLE: PLAIN, SOLID
•
NOMINAL OUTSIDE DIAMETER: 1.813 INCHES IN
•
STYLE DESIGNATOR: PROTRUDING HUB
•
TEETH QUANTITY: 56
•
PRECISION CLASSIFICATION: QUALITY NUMBER 9
•
HUB STYLE DESIGNATOR: PINNED FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
BORE STYLEPLAIN BOTH ENDS
BORE NOMINAL DIAMETER0.251 INCHES BOTH ENDS IN
BODY STYLEPLAIN, SOLID
NOMINAL OUTSIDE DIAMETER1.813 INCHES IN
STYLE DESIGNATORPROTRUDING HUB
TEETH QUANTITY56
PRECISION CLASSIFICATIONQUALITY NUMBER 9
HUB STYLE DESIGNATORPINNED FIRST END
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.219 INCHES FIRST END IN
HUB NOMINAL DIAMETER0.563 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
A6-7-8Interchangeable
interchangeable cross-reference
interchangeable
A628Interchangeable
interchangeable cross-reference
interchangeable
A628-10Interchangeable
interchangeable cross-reference
interchangeable
5330PL1673798Interchangeable
interchangeable cross-reference
interchangeable
362-509-9003Interchangeable
interchangeable cross-reference
interchangeable
UL9102-1PC48Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A678?
A678 is a GEAR,SPUR.
What parts can replace A678?
There are 7 known substitutes for A678: A6-7-8, A628, A628-10 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A678?
A678 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3020-00-618-0086. 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