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Technical Data Sheet
PartsTable / MRO / C404
C404 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

CAPACITOR,VARIABLE,MICA DIELECTR. Key specifications include material: COPPER ALLOY OVERALL, throat_depth: 2.750 INCHES NOMINAL IN, overall_length: 14.000 INCHES NOMINAL IN, connection_type: UNTHREADED INTERNAL TUBE FIRST END, connection_style: PLAIN (TUBE) FIRST END, special_features: SLIDING PIN SCREW; 3/4 IN. SCREW DIA IN.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-277-8975, 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
MRO→ MRO_GENERAL→ C404
NSN: 4720-00-277-8975
FSC: 4720
CAGE: 30327 — IMPERIAL (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
throat_depth2.750 INCHES NOMINAL IN
overall_length14.000 INCHES NOMINAL IN
connection_typeUNTHREADED INTERNAL TUBE FIRST END
connection_stylePLAIN (TUBE) FIRST END
special_featuresSLIDING PIN SCREW; 3/4 IN. SCREW DIA IN
test_load_rating4100.0 POUNDS LBS
surface_treatmentCOPPER ALLOY OVERALL
jaw_nominal_opening4.000 INCHES IN
stem_actuating_end_typeTHREADED EXTERNALLY
largest_outside_diameter0.593 INCHES NOMINAL IN
thread_series_designatorNPT SECOND END
NSN4720-00-277-8975
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: C404 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
B704Interchangeable
interchangeable cross-reference
interchangeable
1381385Interchangeable
interchangeable cross-reference
interchangeable
BX70-4Interchangeable
interchangeable cross-reference
interchangeable
51104Interchangeable
interchangeable cross-reference
interchangeable
19280Interchangeable
interchangeable cross-reference
interchangeable
9800002Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C404?
C404 is a CAPACITOR,VARIABLE,MICA DIELECTR. It is classified as a MRO (MRO_GENERAL).
What parts can replace C404?
There are 21 known substitutes for C404: B704, 1381385, BX70-4 and 18 more. Substitute compatibility should be verified for your specific system.
Is C404 still available?
C404 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