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Technical Data Sheet
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3901A ✓ 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 RING,PISTON is a the manufacturer industrial component. Key specifications include end_item_identification: DEGREASER,MODEL 16,4940-00-422-1774. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2805-00-406-3003, 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
3901A
NSN: 2805-00-406-3003
FSC: 2805
CAGE: 1ML14 — BRINKLEY TECHNOLOGY GROUP LLC DBA HERCULES MANUFACTURING (USA)
SPECIFICATIONS
end_item_identificationDEGREASER,MODEL 16,4940-00-422-1774
NSN2805-00-406-3003
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,PISTON TITLE COMPONENT PN 3901A MFR RING,PISTON
KEY FEATURES
•
MATERIAL: IRON OVERALL
•
OIL PASSAGE TYPE AND QUANTITY: 10 HOLE HORIZONTALLY THROUGH RING
•
RADIAL WALL THICKNESS: 0.1200 INCHES NOMINAL IN
•
RING STYLE: CONCENTRIC
•
CROSS-SECTIONAL SHAPE STYLE: STRAIGHT FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL
•
STANDARD BORE DIAMETER: 2.625 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALIRON OVERALL
OIL PASSAGE TYPE AND QUANTITY10 HOLE HORIZONTALLY THROUGH RING
OIL PASSAGE TYPE AND QUANTITY1 GROOVE OUTSIDE PERIPHERY
RADIAL WALL THICKNESS0.1200 INCHES NOMINAL IN
RING STYLECONCENTRIC
CROSS-SECTIONAL SHAPE STYLESTRAIGHT FACE, DOUBLE SCRAPER, VENTILATED OIL CONTROL
OVERALL WIDTH0.1860 INCHES MINIMUM AND 0.1865 INCHES MAXIMUM IN
STANDARD BORE DIAMETER2.625 INCHES IN
BORE DIAMETER OVERSIZE0.010 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
39-01-AInterchangeable
interchangeable cross-reference
interchangeable
39-1AInterchangeable
interchangeable cross-reference
interchangeable
3901A010Interchangeable
Same NIIN cross-reference
interchangeable
3901A0100SInterchangeable
Same NIIN cross-reference
interchangeable
3901A01005Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3901A?
3901A is a RING,PISTON.
What parts can replace 3901A?
There are 5 known substitutes for 3901A: 39-01-A, 39-1A, 3901A010 and 2 more. Substitute compatibility should be verified for your specific system.
Is 3901A still available?
3901A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026