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Technical Data Sheet
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20551 ✓ Verified by PartsTable
Freecom · MOTOR
WHAT YOU NEED TO KNOW
NEMA frame determines mounting bolt pattern TEFC for outdoor, ODP for dry indoor only
C-face vs foot-mount — different mounting
PRODUCT OVERVIEW

Superfast CD-RW Recorders.<br>Clear installation instructions included.<br>The ideal solution for every PC user.<br>Reads all: CDs, CD-Rs, CD-RWs and MP3 CDs.<br>Including Buffer UnderRun prevention technology. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6105-00-168-3855, 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
20551
NSN: 6105-00-168-3855
FSC: 6105
CAGE: 00462 — GOODRICH CORPORATION DBA TRW LUCAS AEROSPACE (USA)
SPECIFICATIONS
materialALUMINUM BODY
unit_typeGASKET
body_width1.094 INCHES NOMINAL IN
shell_typeSOLID
body_length0.640 INCHES MAXIMUM IN
flange_depth0.280 INCHES MINIMUM AND 0.340 INCHES MAXIMUM SECOND FLANGE IN
flange_styleCONTACT TYPE FIRST FLANGE
specific_useENGINE AIR INLET
thread_class2A ALL ENDS A
adapter_length2.282 INCHES MINIMUM AND 2.302 INCHES MAXIMUM IN
inclosure_typeHERMETICALLY SEALED
overall_length60.000 INCHES NOMINAL IN
NSN6105-00-168-3855
COMPONENT DIAGRAM
ELECTRIC MOTOR — FRAME SIZE = MOUNTING PATTERN SHAFT J-BOX MOUNTING FEET — FRAME — — · — RPM — · — PN: 20551 · Freecom ⚠ VERIFY BEFORE ORDERING NEMA frame size determines mounting bolt pattern — not interchangeable. 56C ≠ 143T bolt pattern. C-face vs foot-mount vs flange — different mounting, same HP doesn't mean drop-in ✓ BROKER TIP TEFC = outdoor/washdown OK. ODP = dry indoor only. TENV = no external fan, explosion-proof areas. 1750 RPM = 4-pole (most common), 3450 RPM = 2-pole, 1150 RPM = 6-pole PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
20-551Upgraded Successor
successor cross-reference
successor
5813709-503Interchangeable
interchangeable cross-reference
interchangeable
AN3102A12S3PInterchangeable
interchangeable cross-reference
interchangeable
S24-2420Interchangeable
interchangeable cross-reference
interchangeable
C9AZ-8260-BInterchangeable
interchangeable cross-reference
interchangeable
CH627Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20551?
20551 is a CONNECTOR,RECEPTACLE,ELECTRICAL manufactured by Freecom.
What parts can replace 20551?
There are 10 known substitutes for 20551: 20-551, 5813709-503, AN3102A12S3P and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20551?
20551 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6105-00-168-3855. 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