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Technical Data Sheet
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1057-020 — 1057-020

✓ Government record, cited
— · MOTOR
PRODUCT OVERVIEW

1057-020: 1057-020.

The 1057-020 is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 6105-01-138-1633, 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
1057-020
NSN: 6105-01-138-1633
FSC: 6105 — Motors, Electrical
CAGE: 51283 — TECHNICAL SERVICES LABORATORY, INC. DBA TECHNICAL SERVICES LABORATORY INC (USA)
SPECIFICATIONS
Part Number1057-020
NSN6105-01-138-1633
COMPONENT DIAGRAM
ELECTRIC MOTOR — FRAME SIZE = MOUNTING PATTERN SHAFT J-BOX MOUNTING FEET — FRAME — — · — RPM — · — PN: 1057-020 · 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
•
PHASE: SINGLE INPUT
•
SHAFT DIAMETER: 0.3125 INCHES NOMINAL SINGLE END IN
•
FREQUENCY IN HERTZ: 60.0 INPUT
•
SHAFT END STYLE: PLAIN SINGLE END
•
CONNECTION TYPE AND VOLTAGE RATING IN VOLTS: 24.0 LINE TO NEUTRAL SINGLE INPUT
•
SPECIFIC USE: FAN
•
LENGTH OF SHAFT FROM HOUSING: 0.875 INCHES SINGLE END IN
TECHNICAL CHARACTERISTICS
PHASESINGLE INPUT
SHAFT DIAMETER0.3125 INCHES NOMINAL SINGLE END IN
FREQUENCY IN HERTZ60.0 INPUT
SHAFT END STYLEPLAIN SINGLE END
OVERALL LENGTH5.500 INCHES IN
CONNECTION TYPE AND VOLTAGE RATING IN VOLTS24.0 LINE TO NEUTRAL SINGLE INPUT
SPECIFIC USEFAN
LENGTH OF SHAFT FROM HOUSING0.875 INCHES SINGLE END IN
CURRENT RATING IN AMPS3.000 SINGLE INPUT
CURRENT RATING METHODLOAD
OTHER ITEMS IN FSC 6105 — Motors, Electrical
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6105-00-001-1471 6105-00-001-1473 6105-00-001-1497 6105-00-001-1710 6105-00-001-1712 6105-00-001-2097 6105-00-001-2098 6105-00-001-3680
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1057-020?
1057-020 is a 1057-020.
What is the NSN for 1057-020?
1057-020 is cataloged in the U.S. Government catalog under NSN 6105-01-138-1633. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.