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Technical Data Sheet
PartsTable / COMPONENT / 1-1021-B
1-1021-B ✓ 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 1-1021-B is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6105-00-646-7858, 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
1-1021-B
NSN: 6105-00-646-7858
FSC: 6105
CAGE: 13685 — NORTHFIELD ELECTRIC MOTOR CO INC (USA)
SPECIFICATIONS
Part Number1-1021-B
NSN6105-00-646-7858
COMPONENT DIAGRAM
ELECTRIC MOTOR — FRAME SIZE = MOUNTING PATTERN SHAFT J-BOX MOUNTING FEET — FRAME — — · — RPM — · — PN: 1-1021-B · 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
KEY FEATURES
•
WINDING TYPE: INDUCTION-SQUIRREL CAGE
•
FREQUENCY IN HERTZ: 60.0 INPUT
•
COOLING METHOD: AMBIENT AIR
•
CONNECTION TYPE AND VOLTAGE RATING IN VOLTS: 117.0 LINE TO NEUTRAL SINGLE INPUT
•
TERMINAL TYPE AND QUANTITY: 5 WIRE LEAD
•
FLAT DEPTH: 0.023 INCHES MINIMUM AND 0.033 INCHES MAXIMUM SINGLE END IN
•
DUTY CYCLE: CONTINUOUS
•
PHASE: SINGLE INPUT
TECHNICAL CHARACTERISTICS (FLIS)
WINDING TYPEINDUCTION-SQUIRREL CAGE
FREQUENCY IN HERTZ60.0 INPUT
COOLING METHODAMBIENT AIR
CONNECTION TYPE AND VOLTAGE RATING IN VOLTS117.0 LINE TO NEUTRAL SINGLE INPUT
TERMINAL TYPE AND QUANTITY5 WIRE LEAD
FLAT DEPTH0.023 INCHES MINIMUM AND 0.033 INCHES MAXIMUM SINGLE END IN
DUTY CYCLECONTINUOUS
PHASESINGLE INPUT
ENCLOSURE FEATUREOPEN PROTECTED
OVERALL LENGTH7.375 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
1389Upgraded Successor
successor cross-reference
successor
4.5PDCUpgraded Successor
successor cross-reference
successor
6515NCM040926Upgraded Successor
successor cross-reference
successor
6553Interchangeable
interchangeable cross-reference
interchangeable
U3272PC26Interchangeable
interchangeable cross-reference
interchangeable
09-908-270PC26Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1-1021-B?
1-1021-B is a 1-1021-B.
What parts can replace 1-1021-B?
There are 14 known substitutes for 1-1021-B: 1389, 4.5PDC, 6515NCM040926 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1-1021-B?
1-1021-B is cataloged in the Federal Logistics Information System (FLIS) under NSN 6105-00-646-7858. 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