Bearing Lock Nuts

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With a nylon insert that grips your threaded shaft or spindle without damaging the threads, these locknuts—sometimes called shaft nuts—keep bearings, bushings, gears, and pulleys in place. They won’t shake loose from vibration. However, their nylon insert also means you shouldn’t use these locknuts in applications with high temperatures. Their sides are slotted, so you can tighten and loosen them with a spanner wrench. To reduce the total size and weight of your assembly, they have chamfered edges.

All meet international standards for bearing locknut dimensions.

Carbon steel locknuts are strong and wear resistant. Zinc-plated steel locknuts have an outer layer of zinc that prevents the steel from rusting in wet areas. Compared to stainless steel, they're stronger, more wear resistant, and less costly, but not as corrosion resistant. Avoid exposing them to salt water and chemicals. 303 stainless steel locknuts are nearly as strong as carbon steel but won’t rust in outdoor, washdown, and other corrosive environments.

When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.

Bearing Number Bore Dia Outer DIa Width Size
SKF HM 3080 Bearing Lock Nuts 111 kN 23028 CCK/W33 62.6 kg 185 kN
SKF HM 3084 Bearing Lock Nuts 8.5 kN 53.6 mm 0.24 kg 38 N/µm
FAG KM40 Bearing Lock Nuts 2 mm 8000 r/min 35.25 mm 0.35
SKF N 092 Bearing Lock Nuts 900 mm 1860.940 kg 1800   31500  
FAG HM44T Bearing Lock Nuts 10 mm mm 10 mm 1540 mm
SKF HM 50 T Bearing Lock Nuts 1.00 mm 52.0000 mm 17000 rpm 20.000 mm
SKF KMTA 22 Bearing Lock Nuts 85.000 mm 49.20 mm 3600 rpm 2600 rpm
FAG HM3052 Bearing Lock Nuts SAFS 640 101.6 mm 2 x B10724-161 163.512 mm
FAG KML34 Bearing Lock Nuts PL 72 5 290.246 mm 359.918 mm
FAG KML36 Bearing Lock Nuts 371 kN 950 r/min 2 mm 31.5 kN
SKF N 032 Bearing Lock Nuts 4 mm 600 mm 12 mm 148 mm
SKF KMT 36 Bearing Lock Nuts 25 74.9 mm 1.06 0.6 mm