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PartsTable / COMPONENT / 637903
637903 ✓ Verified by PartsTable
Legrand · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The IBM 1GB MAIN STORAGE 800/810 is a Legrand industrial component. Key specifications include length: 17.500 INCHES NOMINAL IN, material: STEEL COMP 302 OVERALL, body_width: 2.062 INCHES MAXIMUM IN, blade_width: 1.500 INCHES NOMINAL IN, body_height: 1.062 INCHES MAXIMUM IN, body_length: 5.250 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 1560-00-478-2543, 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
637903
NSN: 1560-00-478-2543
FSC: 1560
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
length17.500 INCHES NOMINAL IN
materialSTEEL COMP 302 OVERALL
body_width2.062 INCHES MAXIMUM IN
blade_width1.500 INCHES NOMINAL IN
body_height1.062 INCHES MAXIMUM IN
body_length5.250 INCHES MAXIMUM IN
blade_length12.000 INCHES NOMINAL IN
hole_diameter0.062 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
overall_width0.750 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
overall_height0.700 INCHES NOMINAL IN
overall_length0.875 INCHES NOMINAL IN
NSN1560-00-478-2543
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: Legrand CAP: 1GB IBM 1GB MAIN STORAGE 800/810 TITLE COMPONENT PN 637903 MFR Legrand IBM 1GB MAIN STORAGE 8
KEY FEATURES
•
1GB Capacity
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
378389Interchangeable
interchangeable cross-reference
interchangeable
3094Interchangeable
IBM 1GB Main Storage 800/810
interchangeable
BAC1505-13900Interchangeable
interchangeable cross-reference
interchangeable
AMS-QQA200-3Interchangeable
interchangeable cross-reference
interchangeable
WW-P-491Interchangeable
interchangeable cross-reference
interchangeable
306Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 637903?
637903 is a IBM 1GB MAIN STORAGE 800/810 manufactured by Legrand.
What parts can replace 637903?
There are 18 known substitutes for 637903: 378389, 3094, BAC1505-13900 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 637903?
637903 is cataloged in the Federal Logistics Information System (FLIS) under NSN 1560-00-478-2543. 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