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Spring Lock Washers for Slotted Bearing Nuts
Designed for use with bearing nuts, these lock washers have a conical shape that presses like a spring against bearings, bushings, gears, and pulleys to hold them in place on your threaded shaft or spindle. They also have an inner tab that sits in the shaft or spindle’s keyway to prevent the nut from loosening.
Steel washers are strong and flexible.
DIN 462 and DIN 5406 washers meet international standards for lock washer dimensions. Pair DIN 462 washers with DIN 1804 bearing nuts, and DIN 5406 washers with DIN 981 bearing nuts.
For technical drawings and 3-D models, click on a part number.
Tab | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | ID, mm | OD, mm | Thick., mm | Wd., mm | Dp., mm | Overall Ht., mm | Hardness | Specifications Met | For Bearing Nut Specifications Met | Each | |
Steel | |||||||||||
For Stepped Nuts | |||||||||||
M30 | 30.000 | 50.000 | 1.200 | 7.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 00000 |
M32 | 32.000 | 52.000 | 1.200 | 7.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
M35 | 35.000 | 55.000 | 1.200 | 7.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
M38 | 38.000 | 58.000 | 1.200 | 8.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
M40 | 40.000 | 62.000 | 1.200 | 8.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
M42 | 42.000 | 62.000 | 1.200 | 8.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
M45 | 45.000 | 68.000 | 1.200 | 8.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
M48 | 48.000 | 75.000 | 1.200 | 8.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
M50 | 50.000 | 75.000 | 1.200 | 8.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
Metric Spring Lock Washers
The arched shape of these washers presses up against a bolt and down against a nut to prevent loosening from wear, vibration, or temperature changes. Similar to a spring, they flatten out as pressure is applied, helping to absorb shocks. They grip bolts more tightly than split and tooth lock washers. Unlike split lock washers, which can only be tightened in one direction, these washers have a continuous body that can rotate in either direction.
Conical and curved washers are functionally the same, and are often referenced using their DIN specifications. These DIN specifications refer to slight differences in OD and thickness. DIN 6796 is the standard for conical spring lock washers, which are also known as Belleville washers.
Steel washers are stronger and more wear resistant than zinc-plated steel and stainless steel. They are best for dry environments, since moisture will cause them to rust. Zinc-plated washers have an outer layer of zinc that protects the inner steel from rust and extends the life of the washer. Similar to zinc plating, washers with a black phosphate coating are protected from rust in wet environments. They have a black finish that blends in with dark surfaces.
Stainless steel washers are more corrosion resistant than steel, and almost as strong. 18-8 stainless steel washers will hold up in wet and humid environments, but will corrode if exposed to salt water or chemicals. 316 stainless steel washers are the most corrosion resistant, and will not corrode from water, salt, or chemicals.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thick., mm | Overall Ht., mm | Hardness | Pkg. Qty. | Pkg. | |
Conical—DIN 6796 | ||||||||
---|---|---|---|---|---|---|---|---|
Steel | ||||||||
M5 | 5.3 | 11.0 | 1.2 | 1.60 | Rockwell C42 | 100 | 000000000 | 000000 |
Zinc-Plated Steel | ||||||||
M5 | 5.3 | 11.0 | 1.2 | 1.60 | Rockwell C42 | 50 | 000000000 | 0000 |
Black-Phosphate Steel | ||||||||
M5 | 5.3 | 11.0 | 1.2 | 1.55 | Not Rated | 100 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||
M5 | 5.3 | 11.0 | 1.2 | 1.60 | Not Rated | 25 | 000000000 | 00000 |
17-7 PH Stainless Steel | ||||||||
M5 | 5.3 | 11.0 | 1.2 | 1.55 | Rockwell C38 | 5 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
M5 | 5.3 | 11.0 | 1.2 | 1.60 | Not Rated | 10 | 000000000 | 00000 |
Metric Split Lock Washers
As a screw is tightened, these metric washers flatten to add tension to the joint, counteracting fatigue around the joint from small amounts of vibration. This makes them a common choice to prevent fasteners from loosening. However, they resist the least amount of vibration compared to other locking washers. They meet a DIN or ASME standard for split lock washer dimensions.
Curved and wave split lock washers can be used with fasteners that have right- or left-hand threads to prevent clockwise and counterclockwise rotation. These washers are reusable—they retain their shape when untightened and will not damage fasteners. Wave washers touch fasteners at more points, so they grip tighter than curved washers. Their shape also compensates for uneven surfaces and tolerance variations.
Stainless steel washers resist corrosion better than steel and are nearly as strong. 18-8 stainless steel washers withstand humid, damp, and washdown environments but will corrode when exposed to salt water and other chlorine solutions.
Stronger and more durable than stainless steel, steel washers plated with zinc or galvanized withstand varying degrees of corrosion. Zinc-plated steel and zinc yellow-chromate plated steel washers withstand wet environments. However, they will corrode in salt water and chlorine solutions. The zinc plating temporarily protects against rust, but once it wears off, the steel will rust.
Steel washers are stronger and resist wear better than zinc-plated steel and stainless steel washers. Use them in dry environments. Black-oxide steel washers have a black residue that forms from being heat treated; the color will wear away over time.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thick., mm | Overall Ht., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
Curved | |||||||||
M6 | 6.1 | 11.8 | 1.2 | 2 | Not Rated | DIN 128A | 100 | 000000000 | 000000 |
Wave | |||||||||
M6 | 6.5 | 11.8 | 1.2 | 2.2 | Not Rated | DIN 128B | 25 | 000000000 | 0000 |
Zinc-Plated Steel | |||||||||
Curved | |||||||||
M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128A | 100 | 000000000 | 00000 |
Wave | |||||||||
M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128B | 100 | 000000000 | 00000 |
Zinc Yellow-Chromate Plated Steel | |||||||||
Curved | |||||||||
M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
Black-Oxide Steel | |||||||||
Curved | |||||||||
M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128A | 50 | 000000000 | 0000 |
Metric Tab Lock Washers
Bend the tab on these metric lock washers to prevent the fastener and washer from turning and loosening due to vibration. All meet DIN dimensional standards.
DIN 432 washers have a partial cone shape that gives them spring-like flexibility, so they distribute force and grip tighter than split and tooth lock washers. However, they do not resist vibration as well as DIN 93 washers. These washers prevent loosening from wear or changes in temperature when you bend the tab against the flats of a hex nut or bolt head. They do not need to be used near the edge of the mounting surface.
Steel washers resist wear better than 316 stainless steel but aren’t as corrosion resistant.
316 stainless steel washers are more corrosion resistant than steel, and nearly as strong. You can expose them to salt water, chlorine solutions, and chemicals without any rusting.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Overall Ht., mm | Thick., mm | Tab Wd., mm | Hardness | Pkg. Qty. | Pkg. | |
DIN 432—Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
M12 | 13 | 30 | 4.5 | 1.2 | 4.5 | Rockwell B50 | 5 | 000000000 | 000000 |
M14 | 15 | 33 | 4.5 | 1.2 | 4.5 | Rockwell B50 | 1 | 000000000 | 0000 |
M16 | 17 | 36 | 4.5 | 1.2 | 5.5 | Rockwell B50 | 1 | 000000000 | 0000 |
DIN 432—316 Stainless Steel | |||||||||
M12 | 13 | 30 | 4.5 | 1.2 | 4.5 | Not Rated | 10 | 000000000 | 00000 |
M14 | 15 | 33 | 4.5 | 1.2 | 4.5 | Not Rated | 5 | 000000000 | 00000 |
M16 | 17 | 36 | 4.5 | 1.2 | 5.5 | Not Rated | 5 | 000000000 | 00000 |
Metric Single-Wave Washers
These curved, flexible washers act like springs to compensate for tolerance variations and uneven surfaces. You can also use them to damp vibration.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
Bronze washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.
Steel washers are harder and hold their shape better than stainless steel washers, but aren’t as corrosion resistant. They have a black finish from heat treatment.
For technical drawings and 3-D models, click on a part number.