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3901ASTD ✓ 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 material: IRON OVERALL, ring_style: CONCENTRIC, joint_style: VERTICAL JOINT, overall_width: 0.1850 INCHES MINIMUM AND 0.1865 INCHES MAXIMUM IN, radial_wall_thickness: 0.1200 INCHES NOMINAL IN, standard_bore_diameter: 2.625 INCHES 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 2805-00-273-0345, 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
3901ASTD
NSN: 2805-00-273-0345
FSC: 2805
CAGE: 1ML14 — BRINKLEY TECHNOLOGY GROUP LLC DBA HERCULES MANUFACTURING (USA)
SPECIFICATIONS
materialIRON OVERALL
ring_styleCONCENTRIC
joint_styleVERTICAL JOINT
overall_width0.1850 INCHES MINIMUM AND 0.1865 INCHES MAXIMUM IN
radial_wall_thickness0.1200 INCHES NOMINAL IN
standard_bore_diameter2.625 INCHES IN
cross-sectional_shape_styleTAPERED FACE
NSN2805-00-273-0345
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,PISTON TITLE COMPONENT PN 3901ASTD MFR RING,PISTON
KEY FEATURES
•
JOINT STYLE: VERTICAL JOINT
•
RING STYLE: CONCENTRIC
•
STANDARD BORE DIAMETER: 2.625 INCHES IN
•
MATERIAL: IRON OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: TAPERED FACE
•
RADIAL WALL THICKNESS: 0.1200 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
JOINT STYLEVERTICAL JOINT
RING STYLECONCENTRIC
STANDARD BORE DIAMETER2.625 INCHES IN
MATERIALIRON OVERALL
OVERALL WIDTH0.1850 INCHES MINIMUM AND 0.1865 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLETAPERED FACE
RADIAL WALL THICKNESS0.1200 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
Y400T00236Interchangeable
interchangeable cross-reference
interchangeable
36106Interchangeable
px12-450r
interchangeable
Y400T236Interchangeable
interchangeable cross-reference
interchangeable
AEN04375328AZ4D71Interchangeable
interchangeable cross-reference
interchangeable
90473A031Interchangeable
interchangeable cross-reference
interchangeable
CL20-65Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3901ASTD?
3901ASTD is a RING,PISTON.
What parts can replace 3901ASTD?
There are 6 known substitutes for 3901ASTD: Y400T00236, 36106, Y400T236 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3901ASTD?
3901ASTD is cataloged in the Federal Logistics Information System (FLIS) under NSN 2805-00-273-0345. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026