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610651-78 — GEAR,SPUR

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

610651-78: GEAR,SPUR.

The GEAR,SPUR is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, body_style: PLAIN, SOLID, bore_style: PLAIN BOTH ENDS, pitch_diameter: 0.6106 INCHES MINIMUM AND 0.6111 INCHES MAXIMUM IN, pressure_angle: 20.0000 DEGREES, teeth_quantity: 44. This part is cataloged in the U.S.

Government catalog under NSN 3020-00-138-8137, 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
610651-78
NSN: 3020-00-138-8137
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
CAGE: 00141 — ROLLER BEARING CO OF AMERICA, INC DIV PIC DESIGN (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
body_stylePLAIN, SOLID
bore_stylePLAIN BOTH ENDS
pitch_diameter0.6106 INCHES MINIMUM AND 0.6111 INCHES MAXIMUM IN
pressure_angle20.0000 DEGREES
teeth_quantity44
style_designatorPROTRUDING HUB
attachment_methodMOUNTING HOLE
surface_treatmentPASSIVATE OVERALL
face_nominal_width0.125 INCHES IN
backlash_designationGRADE E
hub_nominal_diameter0.312 INCHES FIRST END IN
NSN3020-00-138-8137
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GEAR,SPUR TITLE COMPONENT PN 610651-78 MFR GEAR,SPUR
KEY FEATURES
•
BORE NOMINAL DIAMETER: 0.125 INCHES BOTH ENDS IN
•
HUB NOMINAL DIAMETER: 0.312 INCHES FIRST END IN
•
BACKLASH DESIGNATION: GRADE E
•
TEETH QUANTITY: 44
•
BODY STYLE: PLAIN, SOLID
•
BORE STYLE: PLAIN BOTH ENDS
•
MOUNTING HOLE TYPE AND QUANTITY: 2 THREADED TRANSVERSELY THROUGH HUB FIRST END
•
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END: 0.187 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS
BORE NOMINAL DIAMETER0.125 INCHES BOTH ENDS IN
HUB NOMINAL DIAMETER0.312 INCHES FIRST END IN
BACKLASH DESIGNATIONGRADE E
TEETH QUANTITY44
BODY STYLEPLAIN, SOLID
BORE STYLEPLAIN BOTH ENDS
MOUNTING HOLE TYPE AND QUANTITY2 THREADED TRANSVERSELY THROUGH HUB FIRST END
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END0.187 INCHES FIRST END IN
PRECISION CLASSIFICATIONQUALITY NUMBER 14
STYLE DESIGNATORPROTRUDING HUB
OTHER ITEMS IN FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3020-00-001-2090 3020-00-001-4468 3020-00-007-2779 3020-00-009-4033 3020-00-031-2269 3020-00-146-4181 3020-00-146-4222 3020-00-425-7115
SUBSTITUTES & CROSS-REFERENCES 1
2JC3582H78Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 610651-78?
610651-78 is a GEAR,SPUR.
What parts can replace 610651-78?
There is 1 known substitute for 610651-78: 2JC3582H78. Substitute compatibility should be verified for your specific system.
What is the NSN for 610651-78?
610651-78 is cataloged in the U.S. Government catalog under NSN 3020-00-138-8137. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.