PartsTable
Technical Data Sheet
PartsTable / COMPONENT / A4639
A4639 ✓ 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, overall_width: 0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN, overall_height: 0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN, overall_length: 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN, style_designator: PLAIN, starting_edge_shape: STRAIGHT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3020-00-025-3503, 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
A4639
NSN: 3020-00-025-3503
FSC: 3020
CAGE: 30177 — IWC LLC DBA IDEAL WINDLASS COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN
overall_height0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN
overall_length1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN
style_designatorPLAIN
starting_edge_shapeSTRAIGHT
nondefinitive_spec/std_data2 TYPE AND 1 STYLE AND C GRADE
material_document_and_classification66 COMP 1018 TO 1035 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN3020-00-025-3503
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GEAR,SPUR TITLE COMPONENT PN A4639 MFR GEAR,SPUR
KEY FEATURES
•
BORE STYLE: PLAIN BOTH ENDS
•
NOMINAL DISTANCE FROM BORE CENTER TO KEYWAY BOTTOM: 0.9380 INCHES BOTH ENDS IN
•
BODY STYLE: WEBBED, OFFSET, SOLID
•
MATERIAL: STEEL OVERALL
•
BODY RECESS NOMINAL DEPTH: 0.063 INCHES FIRST END IN
•
KEYWAY NOMINAL WIDTH: 0.375 INCHES BOTH ENDS IN
•
STYLE DESIGNATOR: HUBLESS, RECESSED BODY
•
NOMINAL OUTSIDE DIAMETER: 4.200 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
BORE STYLEPLAIN BOTH ENDS
NOMINAL DISTANCE FROM BORE CENTER TO KEYWAY BOTTOM0.9380 INCHES BOTH ENDS IN
BODY STYLEWEBBED, OFFSET, SOLID
MATERIALSTEEL OVERALL
BODY RECESS NOMINAL DEPTH0.063 INCHES FIRST END IN
KEYWAY NOMINAL WIDTH0.375 INCHES BOTH ENDS IN
STYLE DESIGNATORHUBLESS, RECESSED BODY
NOMINAL OUTSIDE DIAMETER4.200 INCHES IN
PRESSURE ANGLE20.0000 DEGREES
FACE NOMINAL WIDTH1.750 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
A4639Interchangeable
interchangeable cross-reference
interchangeable
X1020T442Interchangeable
interchangeable cross-reference
interchangeable
OO-K-220Interchangeable
interchangeable cross-reference
interchangeable
649C773H18Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy A4639?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is A4639?
A4639 is a GEAR,SPUR.
What parts can replace A4639?
There are 4 known substitutes for A4639: A4639, X1020T442, OO-K-220 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A4639?
A4639 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3020-00-025-3503. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — A4639

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026