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918 51 ✓ 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

CAPACITOR,VARIABLE,AIR DIELECTRI. Key specifications include material: STEEL OVERALL, nut_length: 0.625 INCHES NOMINAL IN, nut_diameter: 0.375 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, flange_thickness: 0.187 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5133-00-189-9296, 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
918 51
NSN: 5133-00-189-9296
FSC: 5133
CAGE: 13130 — CLEVELAND TWIST DRILL CO DIV OF GREENFIELD INDUSTRIES INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_length0.625 INCHES NOMINAL IN
nut_diameter0.375 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
flange_thickness0.187 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentNICKEL OVERALL
nominal_thread_size0.190 INCHES IN
cross-sectional_shapeHEXAGONAL FLANGE
thread_quantity_per_inch32
flange_width_across_flats0.437 INCHES NOMINAL IN
NSN5133-00-189-9296
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CAPACITOR,VARIABLE,AIR DIELECTRI TITLE COMPONENT PN 918 51 MFR CAPACITOR,VARIABLE,AIR
KEY FEATURES
•
SHANK STYLE: STRAIGHT ROUND
•
FLUTE LENGTH: 1.000 INCHES NOMINAL IN
•
POINT ANGLE: 118.0 DEGREES NOMINAL
•
MATERIAL: STEEL OVERALL
•
CUTTING ROTATION DIRECTION: RIGHT-HAND
•
CUTTING END STYLE: GENERAL PURPOSE
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
SHANK STYLESTRAIGHT ROUND
FLUTE LENGTH1.000 INCHES NOMINAL IN
POINT ANGLE118.0 DEGREES NOMINAL
SPECIAL FEATURESJOBBERS LG; WIRE SIZE 51
OVERALL LENGTH2.000 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
CUTTING ROTATION DIRECTIONRIGHT-HAND
CUTTING END STYLEGENERAL PURPOSE
FLUTE QUANTITY2
SHANK DIAMETER0.067 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
150-51Interchangeable
interchangeable cross-reference
interchangeable
M150-TP51Interchangeable
interchangeable cross-reference
interchangeable
320118-1Interchangeable
interchangeable cross-reference
interchangeable
558-1505-01-00-00Interchangeable
interchangeable cross-reference
interchangeable
CG2C03-81KInterchangeable
interchangeable cross-reference
interchangeable
666092-107Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 918 51?
918 51 is a CAPACITOR,VARIABLE,AIR DIELECTRI.
What parts can replace 918 51?
There are 31 known substitutes for 918 51: 150-51, M150-TP51, 320118-1 and 28 more. Substitute compatibility should be verified for your specific system.
Is 918 51 still available?
918 51 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