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Technical Data Sheet
PartsTable / COMPONENT / X-426-6
X-426-6 ✓ Verified by PartsTable
— · BOLT SCREW
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

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 CORROSION RESISTING OVERALL, thread_class: 3A NUT THREAD A, thread_length: 0.562 INCHES MAXIMUM STUD THREAD IN, overall_length: 2.125 INCHES NOMINAL IN, hardness_rating: 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM, inside_diameter: 0.875 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-550-3887, 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
X-426-6
NSN: 5307-00-550-3887
FSC: 5307
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thread_class3A NUT THREAD A
thread_length0.562 INCHES MAXIMUM STUD THREAD IN
overall_length2.125 INCHES NOMINAL IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM
inside_diameter0.875 INCHES MINIMUM AND 2.750 INCHES MAXIMUM IN
style_designatorWIRE
thread_directionRIGHT-HAND STUD THREAD
nominal_thread_size0.375 INCHES STUD THREAD IN
thread_pitch_diameters+0.3378 TO 0.3398 INCHES STUD THREAD IN
thread_quantity_per_inch16 STUD THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) NUT THREAD
NSN5307-00-550-3887
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: X-426-6 · 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
•
THREAD QUANTITY PER INCH: 16 NUT THREAD
•
MATERIAL: STEEL COMP 8640
•
THREAD CLASS: 3A NUT THREAD A
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS A322 ASSN STD SINGLE MATERIAL RESPONSE OR AMS A331 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 0.938 INCHES MAXIMUM NUT THREAD IN
•
THREAD PITCH DIAMETERS: +0.3378 TO 0.3398 INCHES STUD THREAD IN
•
THREAD SERIES DESIGNATOR: UNS STUD THREAD
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)
THREAD QUANTITY PER INCH16 NUT THREAD
MATERIALSTEEL COMP 8640
THREAD CLASS3A NUT THREAD A
OVERALL LENGTH2.125 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS A322 ASSN STD SINGLE MATERIAL RESPONSE OR AMS A331 ASSN STD SINGLE MATERIAL RESPONSE
THREAD LENGTH0.938 INCHES MAXIMUM NUT THREAD IN
THREAD PITCH DIAMETERS+0.3378 TO 0.3398 INCHES STUD THREAD IN
THREAD SERIES DESIGNATORUNS STUD THREAD
NOMINAL THREAD SIZE0.375 INCHES NUT THREAD IN
THREAD LENGTH0.562 INCHES MAXIMUM STUD THREAD IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
6436Interchangeable
interchangeable cross-reference
interchangeable
2000222Interchangeable
interchangeable cross-reference
interchangeable
2256741PC1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X-426-6?
X-426-6 is a CAPACITOR,FIXED,ELECTROLYTIC.
What parts can replace X-426-6?
There are 3 known substitutes for X-426-6: 6436, 2000222, 2256741PC1. Substitute compatibility should be verified for your specific system.
What is the NSN for X-426-6?
X-426-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-550-3887. 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