PartsTable
Technical Data Sheet
PartsTable / COMPONENT / E-3942 ITEM 125
E-3942 ITEM 125 ✓ 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 ASSEMBLY,SPEED DECREASER is a the manufacturer industrial component. Key specifications include material: STEEL, end_similarity: NOT IDENTICAL, overall_length: 9.000 INCHES NOMINAL IN, first_end_style: PLAIN, second_end_style: FLAT KEYWAY, first_end_diameter: 1.5748 INCHES NOMINAL 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 3040-01-188-8580, 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
E-3942 ITEM 125
NSN: 3040-01-188-8580
FSC: 3040
CAGE: 07524 — DOVER PUMPS & PROCESS SOLUTIONS SEGMENT INC DBA BLACKMER DIV BLACKMER (USA)
SPECIFICATIONS
materialSTEEL
step_quantity4
end_similarityNOT IDENTICAL
overall_length9.000 INCHES NOMINAL IN
first_end_stylePLAIN
second_end_styleFLAT KEYWAY
first_end_diameter1.5748 INCHES NOMINAL IN
second_end_diameter1.5000 INCHES NOMINAL IN
largest_step_diameter1.750 INCHES NOMINAL IN
external_keyway_length2.625 INCHES NOMINAL SECOND END IN
second_end_keyway_depth0.219 INCHES NOMINAL IN
second_end_keyway_width0.3750 INCHES NOMINAL IN
NSN3040-01-188-8580
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GEAR ASSEMBLY,SPEED DECREASER TITLE COMPONENT PN E-3942 ITEM 125 MFR GEAR ASSEMBLY,SPEED DE
KEY FEATURES
•
FIRST END STYLE: PLAIN
•
SECOND END STYLE: FLAT KEYWAY
•
MATERIAL: STEEL
•
SECOND END KEYWAY WIDTH: 0.3750 INCHES NOMINAL IN
•
FIRST END DIAMETER: 1.5748 INCHES NOMINAL IN
•
EXTERNAL KEYWAY LENGTH: 2.625 INCHES NOMINAL SECOND END IN
•
SECOND END KEYWAY DEPTH: 0.219 INCHES NOMINAL IN
•
STEP QUANTITY: 4
TECHNICAL CHARACTERISTICS (FLIS)
FIRST END STYLEPLAIN
SECOND END STYLEFLAT KEYWAY
MATERIALSTEEL
SECOND END KEYWAY WIDTH0.3750 INCHES NOMINAL IN
FIRST END DIAMETER1.5748 INCHES NOMINAL IN
EXTERNAL KEYWAY LENGTH2.625 INCHES NOMINAL SECOND END IN
SECOND END KEYWAY DEPTH0.219 INCHES NOMINAL IN
STEP QUANTITY4
LARGEST STEP DIAMETER1.750 INCHES NOMINAL IN
SECOND END DIAMETER1.5000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
477770Interchangeable
interchangeable cross-reference
interchangeable
T0-335Interchangeable
interchangeable cross-reference
interchangeable
765-3Interchangeable
interchangeable cross-reference
interchangeable
E-3942Interchangeable
interchangeable cross-reference
interchangeable
919934Interchangeable
interchangeable cross-reference
interchangeable
915134Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy E-3942 ITEM 125?
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 E-3942 ITEM 125?
E-3942 ITEM 125 is a GEAR ASSEMBLY,SPEED DECREASER.
What parts can replace E-3942 ITEM 125?
There are 16 known substitutes for E-3942 ITEM 125: 477770, T0-335, 765-3 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for E-3942 ITEM 125?
E-3942 ITEM 125 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3040-01-188-8580. 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 — E-3942 ITEM 125

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