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J-20 — CAPACITOR,VARIABLE,AIR DIELECTRI

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

J-20: CAPACITOR,VARIABLE,AIR DIELECTRI.

CAPACITOR,VARIABLE,AIR DIELECTRI. Key specifications include material: RUBBER SILICONE BODY, shaft_type: DRIVE SHAFT, bend_radius: 2.220 INCHES NOMINAL IN, body_length: 1.156 INCHES NOMINAL IN, temp_rating: 125.0 CELSIUS SINGLE RESPONSE DEGC, outer_radius: 4.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4720-00-017-0797, 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
J-20
NSN: 4720-00-017-0797
NIINs: 000170797, 000182162, 000526081, 000795877, 000805379, 000805427, 000968873, 001042018, 001464897, 001892777, 001892779, 001892786, 001892789, 002033031, 002091564, 002354118, 002354120, 002354142, 002779028, 002889743, 002889752, 002889754, 002889757, 002889758, 002889761, 003637319, 004019272, 004019299, 004771798, 004895350, 005295272, 005414243, 005560102, 005951820, 006146230, 006224743, 006252202, 007307310, 008391192, 008466558, 008521433, 009020184, 009447075, 009641399, 009733994, 009851293, 009860923, 009889551, 010121677, 010693186, 010702484, 011147728, 012180780, 012939313, 012941364, 013935581, 014337177, 014975836, 016534033, 016534034, 016534035, 016621405, 016674226, 016944468, 016944485
FSC: 4720 — Hose and Flexible Tubing
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialRUBBER SILICONE BODY
shaft_typeDRIVE SHAFT
bend_radius2.220 INCHES NOMINAL IN
body_length1.156 INCHES NOMINAL IN
temp_rating125.0 CELSIUS SINGLE RESPONSE DEGC
outer_radius4.000 INCHES NOMINAL IN
overall_width1.125 INCHES NOMINAL IN
terminal_typeTAB, SOLDER LUG
exterior_colorBLACK
overall_height2.344 INCHES NOMINAL IN
overall_length2.875 INCHES MAXIMUM IN
wall_thickness1.6 MILLIMETERS NOMINAL MM
NSN4720-00-017-0797
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: J-20 · 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
KEY FEATURES
•
TEMP RATING: 250.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
LAYER COMPOSITION AND LOCATION: 1ST LAYER SPIRALLY LAID COTTON CORD AND OUTER LAYER MOLDED RUBBER, SYNTHETIC
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 0.856 INCHES NOMINAL IN
•
OPERATING PRESSURE: 50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
SPECIFICATION/STANDARD DATA: 81343-SAE 20R3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
NONDEFINITIVE SPEC/STD DATA: D2 CLASS
•
INSIDE DIAMETER: 0.750 INCHES NOMINAL IN
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
TEMP RATING250.0 FAHRENHEIT SINGLE RESPONSE DEGF
LAYER COMPOSITION AND LOCATION1ST LAYER SPIRALLY LAID COTTON CORD AND OUTER LAYER MOLDED RUBBER, SYNTHETIC
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER0.856 INCHES NOMINAL IN
OPERATING PRESSURE50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SPECIFICATION/STANDARD DATA81343-SAE 20R3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NONDEFINITIVE SPEC/STD DATAD2 CLASS
INSIDE DIAMETER0.750 INCHES NOMINAL IN
INSIDE SURFACE CONDITIONSMOOTH
MEDIA FOR WHICH DESIGNEDALCOHOL, METHYL AND ETHYLENE GLYCOL AND WATER, FRESH AND FUEL/OIL, HYDROCARBON SINGLE RESPONSE
SUBSTITUTES & CROSS-REFERENCES 4
4391Reference document
Same NSN cross-reference
Reference document — Secondary reference
20R3 3/4IDReference document
Same NSN cross-reference
Reference document — Secondary reference
6435Reference document
Same NSN cross-reference
Reference document — Secondary reference
4420Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Shelf-life managedAcquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is J-20?
J-20 is a CAPACITOR,VARIABLE,AIR DIELECTRI.
What parts can replace J-20?
There are 4 known substitutes for J-20: 4391, 20R3 3/4ID, 6435 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for J-20?
J-20 is cataloged in the U.S. Government catalog under NSN 4720-00-017-0797. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.