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19639 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

CAPACITOR,FIXED,PAPER DIELECTRIC. Key specifications include material: RUBBER, end_item_identification: EA-6B; SERVO CYLINDER 1650-00-906-5367, part_name_assigned_by_controlling_agency: INAVY-DUST SEAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-027-3779, 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
19639
NSN: 5315-00-027-3779
FSC: 5315
CAGE: 99643 — EATON AEROSPACE LLC DBA EATON AEROSPACE JACKSON (USA)
SPECIFICATIONS
materialRUBBER
end_item_identificationEA-6B; SERVO CYLINDER 1650-00-906-5367
part_name_assigned_by_controlling_agencyINAVY-DUST SEAL
NSN5315-00-027-3779
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 19639 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
PIN OVERALL LENGTH: 0.320 INCHES NOMINAL IN
•
PIN OVERALL DIAMETER: 0.0625 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-423,COMP 302,FORM 1,COND B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE FINISH: 16.0 MICROINCHES OUTSIDE DIAMETER
•
MATERIAL: STEEL COMP 302 OVERALL
•
FIRST END TAPER LENGTH: 0.010 INCHES NOMINAL IN
•
FIRST END STYLE: CHAMFERED
•
FIRST END TAPER ANGLE: 45.0 DEGREES NOMINAL
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)
PIN OVERALL LENGTH0.320 INCHES NOMINAL IN
PIN OVERALL DIAMETER0.0625 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-423,COMP 302,FORM 1,COND B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE FINISH16.0 MICROINCHES OUTSIDE DIAMETER
MATERIALSTEEL COMP 302 OVERALL
FIRST END TAPER LENGTH0.010 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
FIRST END TAPER ANGLE45.0 DEGREES NOMINAL
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
WWN351Interchangeable
interchangeable cross-reference
interchangeable
06874Interchangeable
interchangeable cross-reference
interchangeable
4001/630-15/32Interchangeable
interchangeable cross-reference
interchangeable
4000-0468Interchangeable
interchangeable cross-reference
interchangeable
533.4688Interchangeable
interchangeable cross-reference
interchangeable
Y028 778 08Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 19639?
19639 is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace 19639?
There are 7 known substitutes for 19639: WWN351, 06874, 4001/630-15/32 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 19639?
19639 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-027-3779. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026