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489168 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · MOTOR
PRODUCT OVERVIEW

489168: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL COMP 8740 OVERALL, nut_style: DOUBLE HEXAGON, thread_class: 3B, thread_series: UNF, overall_height: 0.318 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 6105-00-571-9839, 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
489168
NSN: 6105-00-571-9839
NIINs: 005719839, 009419643
FSC: 6105 — Motors, Electrical
CAGE: 57733 — STEWART-WARNER CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
nut_styleDOUBLE HEXAGON
thread_class3B
thread_seriesUNF
overall_height0.318 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.047 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
width_across_flats0.306 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
washer_outside_diameter0.400 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
NSN6105-00-571-9839
COMPONENT DIAGRAM
ELECTRIC MOTOR — FRAME SIZE = MOUNTING PATTERN SHAFT J-BOX MOUNTING FEET — FRAME — — · — RPM — · — PN: 489168 · 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
SUBSTITUTES & CROSS-REFERENCES 1
8359753Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 489168?
489168 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace 489168?
There is 1 known substitute for 489168: 8359753. Substitute compatibility should be verified for your specific system.
What is the NSN for 489168?
489168 is cataloged in the U.S. Government catalog under NSN 6105-00-571-9839. 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.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.