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FF644 ✓ 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 STONE,SHARPENING is a the manufacturer industrial component. Key specifications include stone_style: SHARPENING, overall_length: 4.000 INCHES NOMINAL IN, overall_diameter: 0.500 INCHES NOMINAL IN, small_end_diameter: 0.250 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 5345-00-253-4401, 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
FF644
NSN: 5345-00-253-4401
FSC: 5345
CAGE: 72819 — OHMITE HOLDING, L.L.C. (USA)
SPECIFICATIONS
stone_styleSHARPENING
overall_length4.000 INCHES NOMINAL IN
overall_diameter0.500 INCHES NOMINAL IN
small_end_diameter0.250 INCHES NOMINAL IN
NSN5345-00-253-4401
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available STONE,SHARPENING TITLE COMPONENT PN FF644 MFR STONE,SHARPENING
KEY FEATURES
•
STONE STYLE: SHARPENING
•
OVERALL DIAMETER: 0.500 INCHES NOMINAL IN
•
SMALL END DIAMETER: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STONE STYLESHARPENING
OVERALL LENGTH4.000 INCHES NOMINAL IN
OVERALL DIAMETER0.500 INCHES NOMINAL IN
SMALL END DIAMETER0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
334AInterchangeable
interchangeable cross-reference
interchangeable
CM334AInterchangeable
interchangeable cross-reference
interchangeable
400-5841Interchangeable
interchangeable cross-reference
interchangeable
334Interchangeable
interchangeable cross-reference
interchangeable
4353EInterchangeable
interchangeable cross-reference
interchangeable
SS-S-736Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF644?
FF644 is a STONE,SHARPENING.
What parts can replace FF644?
There are 7 known substitutes for FF644: 334A, CM334A, 400-5841 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FF644?
FF644 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5345-00-253-4401. 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