PartsTable
Technical Data Sheet
PartsTable / MRO / M251
M251 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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

The CAPACITOR 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 diameter: 0.188 INCHES NOMINAL IN, material: STEEL OVERALL, body_length: 2.000 INCHES NOMINAL IN, overall_width: 2.250 INCHES NOMINAL IN, terminal_type: TAB W/SCREW, overall_height: 3.812 INCHES NOMINAL 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 5315-00-010-3411, 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→ M251
NSN: 5315-00-010-3411
FSC: 5315
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
diameter0.188 INCHES NOMINAL IN
materialSTEEL OVERALL
body_length2.000 INCHES NOMINAL IN
overall_width2.250 INCHES NOMINAL IN
terminal_typeTAB W/SCREW
overall_height3.812 INCHES NOMINAL IN
overall_length10.250 INCHES NOMINAL IN
style_designatorSTANDARD
underloop_length2.000 INCHES NOMINAL IN
contact_adjustabilityDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
contact_action_stimulusINCREASE
nonpile-up_contact_arrangement1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION
NSN5315-00-010-3411
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M251 · 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
•
DIAMETER: 0.188 INCHES NOMINAL IN
•
UNDERLOOP LENGTH: 2.000 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: STANDARD
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)
DIAMETER0.188 INCHES NOMINAL IN
UNDERLOOP LENGTH2.000 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORSTANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
103408Interchangeable
interchangeable cross-reference
interchangeable
9X1123-16Interchangeable
interchangeable cross-reference
interchangeable
900810Interchangeable
interchangeable cross-reference
interchangeable
11X608Interchangeable
interchangeable cross-reference
interchangeable
3752815Interchangeable
interchangeable cross-reference
interchangeable
0901344-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy M251?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is M251?
M251 is a CAPACITOR. It is classified as a MRO (MRO_GENERAL).
What parts can replace M251?
There are 27 known substitutes for M251: 103408, 9X1123-16, 900810 and 24 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M251?
M251 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-010-3411. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — M251

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026