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AS21921-6J — CAPACITOR,FIXED,ELECTROLYTIC

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS21921-6J: CAPACITOR,FIXED,ELECTROLYTIC.

The CAPACITOR,FIXED,ELECTROLYTIC is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include material: STEEL COMP 304 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.800 INCHES NOMINAL IN, seat_angle: 45.0 DEGREES NOMINAL, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This part is cataloged in the U.S.

Government catalog under NSN 4730-01-074-6036, 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
AS21921-6J
NSN: 4730-01-074-6036
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
nut_styleTUBE COUPLING
nut_height0.800 INCHES NOMINAL IN
seat_angle45.0 DEGREES NOMINAL
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
length_to_shoulder0.578 INCHES NOMINAL IN
width_across_flats0.688 INCHES NOMINAL IN
nominal_thread_size0.562 INCHES IN
smallest_inside_diameter0.425 INCHES NOMINAL IN
NSN4730-01-074-6036
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS21921-6J · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
LENGTH TO SHOULDER: 0.578 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.688 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
SEAT ANGLE: 45.0 DEGREES NOMINAL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.562 INCHES IN
•
SPECIFICATION/STANDARD DATA: 81343 - AS21921 GOVERNMENT STANDARD
•
NUT HEIGHT: 0.800 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
LENGTH TO SHOULDER0.578 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.688 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
SEAT ANGLE45.0 DEGREES NOMINAL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.562 INCHES IN
SPECIFICATION/STANDARD DATA81343 - AS21921 GOVERNMENT STANDARD
NUT HEIGHT0.800 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLETUBE COUPLING
SUBSTITUTES & CROSS-REFERENCES 7
SAE-AS18280Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
7105X6Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS21921Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS21921-6JReference document
Same NSN cross-reference
Reference document — Secondary reference
AS18280Reference document
Same NSN cross-reference
Reference document — Secondary reference
4730PL1454750Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS21921-6J?
AS21921-6J is a CAPACITOR,FIXED,ELECTROLYTIC.
What parts can replace AS21921-6J?
There are 7 known substitutes for AS21921-6J: SAE-AS18280, 7105X6, AS21921 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS21921-6J?
AS21921-6J is cataloged in the U.S. Government catalog under NSN 4730-01-074-6036. 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.