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X440 ✓ 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 BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include length: 12.000 INCHES NOMINAL IN, material: RUBBER SYNTHETIC, inside_radius: 0.024 INCHES NOMINAL IN, overall_width: 0.141 INCHES NOMINAL IN, physical_form: SOLID, outside_radius: 0.071 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 9390-00-067-6553, 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
X440
NSN: 9390-00-067-6553
FSC: 9390
CAGE: 1N879 — MID-COAST INDUSTRIES, INC DIV MID-ATLANTIC RUBBER COMPANY (USA)
SPECIFICATIONS
length12.000 INCHES NOMINAL IN
materialRUBBER SYNTHETIC
inside_radius0.024 INCHES NOMINAL IN
overall_width0.141 INCHES NOMINAL IN
physical_formSOLID
outside_radius0.071 INCHES NOMINAL IN
overall_height0.406 INCHES NOMINAL IN
base_flange_thickness0.047 INCHES NOMINAL IN
first_slot/groove_depth0.359 INCHES NOMINAL IN
left_side_flange_height0.335 INCHES NOMINAL IN
environmental_protectionWARP/TWIST
right_side_flange_height0.335 INCHES NOMINAL IN
NSN9390-00-067-6553
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BEARING,BALL,ANNULAR TITLE COMPONENT PN X440 MFR BEARING,BALL,ANNULAR
KEY FEATURES
•
NONMETALLIC HARDNESS RATING: 45.0 MINIMUM SHORE DUROMETER A AND 55.0 MAXIMUM SHORE DUROMETER A
•
CROSS-SECTIONAL SHAPE STYLE: OPEN CHANNEL
•
FILLET RADIUS WHERE LEFT FLANGE JOINS BASE FLANGE: 0.023 INCHES NOMINAL IN
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: AS DIFFERENTIATED BY OVERALL HEIGHT,OVERALL WIDTH,LENGTH,LEFT SIDE FLANGE THICKNESS,RIGHT SIDE FLANGE HEIGHT,RIGHT SIDE FLANGE THICKNESS,LEFT SIDE FLANGE TOP OUTER RADIUS,RIGHT SIDE FLANGE TOP OUTER RADIUS,FILLET RADIUS WHERE LEFT FLANGE JOINS BASE FLANGE,OUTER RADIUS WHERE LEFT FLANGE JOINS BASE FLANGE,BASE FLANGE THICKNESS,OUTER RADIUS WHERE RIGHT FLANGE JOINS BASE FLANGE,FILLET RADIUS WHERE RIGHT FLANGE JOINS BASE FLANGE
•
LEFT-SIDE FLANGE TIP STYLE: LEFT W/ OUTSIDE RADIUS
•
RIGHT SIDE FLANGE THICKNESS: 0.047 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT0.406 INCHES NOMINAL IN
NONMETALLIC HARDNESS RATING45.0 MINIMUM SHORE DUROMETER A AND 55.0 MAXIMUM SHORE DUROMETER A
CROSS-SECTIONAL SHAPE STYLEOPEN CHANNEL
FILLET RADIUS WHERE LEFT FLANGE JOINS BASE FLANGE0.023 INCHES NOMINAL IN
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY OVERALL HEIGHT,OVERALL WIDTH,LENGTH,LEFT SIDE FLANGE THICKNESS,RIGHT SIDE FLANGE HEIGHT,RIGHT SIDE FLANGE THICKNESS,LEFT SIDE FLANGE TOP OUTER RADIUS,RIGHT SIDE FLANGE TOP OUTER RADIUS,FILLET RADIUS WHERE LEFT FLANGE JOINS BASE FLANGE,OUTER RADIUS WHERE LEFT FLANGE JOINS BASE FLANGE,BASE FLANGE THICKNESS,OUTER RADIUS WHERE RIGHT FLANGE JOINS BASE FLANGE,FILLET RADIUS WHERE RIGHT FLANGE JOINS BASE FLANGE
LEFT-SIDE FLANGE TIP STYLELEFT W/ OUTSIDE RADIUS
RIGHT SIDE FLANGE THICKNESS0.047 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC
OUTER RADIUS WHERE RIGHT FLANGE JOINS BASE FLANGE0.070 INCHES NOMINAL IN
LENGTH12.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
S16073Interchangeable
interchangeable cross-reference
interchangeable
SRB305SInterchangeable
interchangeable cross-reference
interchangeable
1B4115Interchangeable
interchangeable cross-reference
interchangeable
K168AInterchangeable
interchangeable cross-reference
interchangeable
S16001Interchangeable
interchangeable cross-reference
interchangeable
7305Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X440?
X440 is a BEARING,BALL,ANNULAR.
What parts can replace X440?
There are 8 known substitutes for X440: S16073, SRB305S, 1B4115 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for X440?
X440 is cataloged in the Federal Logistics Information System (FLIS) under NSN 9390-00-067-6553. 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