PartsTable
Technical Data Sheet
PartsTable / MRO / 21220-1
21220-1 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

CAPACITOR,FIXED,CERAMIC DIELECTR. Key specifications include material: STEEL COMP 302 OR STEEL COMP 431 OVERALL, head_style: HEADLESS (SETSCREW), point_style: CONE, thread_class: 3A A, thread_length: 0.250 INCHES MAXIMUM IN, overall_length: 14.0 MILLIMETERS NOMINAL MM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-721-4644, 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→ 21220-1
NSN: 5305-00-721-4644
FSC: 5305
CAGE: 60674 — MICROWAVE DEVICES INC (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 431 OVERALL
head_styleHEADLESS (SETSCREW)
point_styleCONE
thread_class3A A
thread_length0.250 INCHES MAXIMUM IN
overall_length14.0 MILLIMETERS NOMINAL MM
fastener_length0.250 INCHES NOMINAL IN
special_features5.0 MM LOCKING SCREW; SELF-TAPPING; T25 STARDRIVE RECESS; LENGTH: 14 MM; END ITEM: SCREW SET, BONE, NSN 6515-01-584-1870 MM
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
internal_drive_styleHEXAGON
NSN5305-00-721-4644
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 21220-1 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HEAD STYLE: HEADLESS (SETSCREW)
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD LENGTH: 0.250 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7720 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-18732 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
WIDTH ACROSS FLATS: 0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM 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 (FLIS)
HEAD STYLEHEADLESS (SETSCREW)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD LENGTH0.250 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-18732 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
WIDTH ACROSS FLATS0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
INTERNAL DRIVE STYLEHEXAGON
THREAD CLASS3A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
212201Interchangeable
Dr1ve
interchangeable
PM21220-1Interchangeable
interchangeable cross-reference
interchangeable
6515NCM105294Interchangeable
interchangeable cross-reference
interchangeable
212.201Interchangeable
interchangeable cross-reference
interchangeable
16401Interchangeable
interchangeable cross-reference
interchangeable
NASM565-BC8H4Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21220-1?
21220-1 is a CAPACITOR,FIXED,CERAMIC DIELECTR. It is classified as a MRO (MRO_GENERAL).
What parts can replace 21220-1?
There are 7 known substitutes for 21220-1: 212201, PM21220-1, 6515NCM105294 and 4 more. Substitute compatibility should be verified for your specific system.
Is 21220-1 still available?
21220-1 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