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PartsTable / COMPONENT / FF197
FF197 ✓ Verified by PartsTable
— · PIPE SECTION
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,FIXED,MICA DIELECTRIC. Key specifications include guide: NOT INCLUDED, diameter: 0.375 INCHES NOMINAL IN, material: PLASTIC CASE, end_style: SPRING END,SQUARED BOTH ENDS, thickness: 0.500 INCHES NOMINAL IN, body_style: HOLE MOUNTED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-990-1679, 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
FF197
NSN: 4720-00-990-1679
FSC: 4720
CAGE: 3MHG8 — NAPA AUTO PARTS INC DBA NAPA AUTO PARTS (USA)
SPECIFICATIONS
guideNOT INCLUDED
diameter0.375 INCHES NOMINAL IN
materialPLASTIC CASE
end_styleSPRING END,SQUARED BOTH ENDS
thickness0.500 INCHES NOMINAL IN
body_styleHOLE MOUNTED
body_width0.415 INCHES MAXIMUM IN
flute_typeINTEGRAL
scale_nameVACUUM
scale_typeARC
shank_typeMORSE TAPER
body_height0.625 INCHES NOMINAL IN
NSN4720-00-990-1679
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: FF197 · 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 30
M21 SPECIALInterchangeable
interchangeable cross-reference
interchangeable
3905G502Interchangeable
interchangeable cross-reference
interchangeable
M21Interchangeable
interchangeable cross-reference
interchangeable
52412Interchangeable
interchangeable cross-reference
interchangeable
153190Interchangeable
interchangeable cross-reference
interchangeable
B94.19 TABLE 19Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF197?
FF197 is a CAPACITOR,FIXED,MICA DIELECTRIC.
What parts can replace FF197?
There are 30 known substitutes for FF197: M21 SPECIAL, 3905G502, M21 and 27 more. Substitute compatibility should be verified for your specific system.
Is FF197 still available?
FF197 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