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4L79 — GEAR,SPUR

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

4L79: GEAR,SPUR.

The GEAR,SPUR is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, bore_style: PLAIN BOTH ENDS, tooth_form: STANDARD, pitch_diameter: 2.8125 INCHES NOMINAL IN, pressure_angle: 14.5000 DEGREES, teeth_quantity: 135. This part is cataloged in the U.S.

Government catalog under NSN 3020-01-256-3690, 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
4L79
NSN: 3020-01-256-3690
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
CAGE: 12763 — DYNALEC CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
bore_stylePLAIN BOTH ENDS
tooth_formSTANDARD
pitch_diameter2.8125 INCHES NOMINAL IN
pressure_angle14.5000 DEGREES
teeth_quantity135
style_designatorPROTRUDING HUB
hub_style_designatorPLAIN FIRST END
bore_nominal_diameter0.500 INCHES BOTH ENDS IN
nominal_outside_diameter2.854 INCHES IN
material_document_and_classificationQQ-A-355 FED SPEC SINGLE MATERIAL RESPONSE BODY
NSN3020-01-256-3690
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GEAR,SPUR TITLE COMPONENT PN 4L79 MFR GEAR,SPUR
KEY FEATURES
•
BORE NOMINAL DIAMETER: 0.500 INCHES BOTH ENDS IN
•
TEETH QUANTITY: 135
•
BORE STYLE: PLAIN BOTH ENDS
•
STYLE DESIGNATOR: PROTRUDING HUB
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-267 FED SPEC SINGLE MATERIAL RESPONSE HUB
•
PITCH DIAMETER: 2.8125 INCHES NOMINAL IN
•
TOOTH FORM: STANDARD
TECHNICAL CHARACTERISTICS
BORE NOMINAL DIAMETER0.500 INCHES BOTH ENDS IN
TEETH QUANTITY135
BORE STYLEPLAIN BOTH ENDS
STYLE DESIGNATORPROTRUDING HUB
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-267 FED SPEC SINGLE MATERIAL RESPONSE HUB
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-355 FED SPEC SINGLE MATERIAL RESPONSE BODY
PITCH DIAMETER2.8125 INCHES NOMINAL IN
TOOTH FORMSTANDARD
HUB STYLE DESIGNATORPLAIN FIRST END
NOMINAL OUTSIDE DIAMETER2.854 INCHES IN
SUBSTITUTES & CROSS-REFERENCES 2
MB4202-1Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
MB4202-1 PIECE 19,20Reference 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 4L79?
4L79 is a GEAR,SPUR.
What parts can replace 4L79?
There are 2 known substitutes for 4L79: MB4202-1, MB4202-1 PIECE 19,20. Substitute compatibility should be verified for your specific system.
What is the NSN for 4L79?
4L79 is cataloged in the U.S. Government catalog under NSN 3020-01-256-3690. 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.