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Technical Data Sheet
PartsTable / COMPONENT / 20R77B
20R77B ✓ Verified by PartsTable
— · 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

The 20R77B is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6105-01-067-6704, 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
20R77B
NSN: 6105-01-067-6704
FSC: 6105
CAGE: 32423 — AMERICAN PRECISION INDUSTRIES INC RAPIDSYN DIV (USA)
SPECIFICATIONS
Part Number20R77B
NSN6105-01-067-6704
COMPONENT DIAGRAM
ELECTRIC MOTOR — FRAME SIZE = MOUNTING PATTERN SHAFT J-BOX MOUNTING FEET — FRAME — — · — RPM — · — PN: 20R77B · OEM ⚠ 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 14
4563AInterchangeable
interchangeable cross-reference
interchangeable
0905125-1Interchangeable
interchangeable cross-reference
interchangeable
K113Interchangeable
interchangeable cross-reference
interchangeable
2187749Interchangeable
interchangeable cross-reference
interchangeable
104-313Interchangeable
interchangeable cross-reference
interchangeable
1615Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20R77B?
20R77B is a 20R77B.
What parts can replace 20R77B?
There are 14 known substitutes for 20R77B: 4563A, 0905125-1, K113 and 11 more. Substitute compatibility should be verified for your specific system.
Is 20R77B still available?
20R77B is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026