System of Measurement System of Measurement |
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ID ID |
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OD OD |
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Material Material |
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Washer Type Washer Type |
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| Split Lock | Spring Lock |
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| Tab Lock | Wave |
Thickness Thickness | Show |
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Thickness Thickness | Hide |
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Spring Lock Washer Shape Spring Lock Washer Shape |
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 | Conical |
Hardness Hardness |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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For Bearing Nut Face Style For Bearing Nut Face Style |
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For Bearing Nut Specifications Met For Bearing NutSpecifications Met |
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About Washers
More
Metric Split Lock Washers
As you tighten a bolt, these metric washers flatten to add tension to the threaded joint and prevent loosening from small amounts of vibration. All of these washers meet a DIN or ASME standard for split lock washer dimensions.
Curved and wave split lock washers can be used with bolts that have right- or left-hand threads to prevent clockwise or counterclockwise rotation from vibration. Although they don’t grip as tight as standard split lock washers for applications with clockwise rotation, they are best for those with counterclockwise rotation. These washers retain their shape when untightened and will not damage nuts and bolts, so all can be reused. Wave washers grip tighter than curved washers because they make contact with your surface at more points. Their wave design also means they compensate for uneven surfaces and tolerance variations.
Stainless steel washers are more corrosion resistant than steel, and nearly as strong. 18-8 stainless steel washers are good for humid, damp, and washdown environments, but will corrode when exposed to salt water and other chlorine solutions.
Use zinc-plated and yellow zinc-plated steel washers in mostly dry environments. The zinc plating offers temporary rust protection, but once it wears away the steel will rust. All of these washers are stronger and more wear resistant than stainless steel.
Steel washers are stronger and more wear resistant than zinc-plated steel and stainless steel. Use them in dry environments because they will rust in wet and corrosive environments. Black 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 | 0000 |
Wave | |||||||||
| M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128B | 100 | 000000000 | 0000 |
Yellow Zinc-Plated Steel | |||||||||
Curved | |||||||||
| M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128A | 100 | 000000000 | 0000 |
Black Steel | |||||||||
Curved | |||||||||
| M6 | 6.1 | 11.8 | 1.2 | 2 | Rockwell C44 | DIN 128A | 50 | 000000000 | 0000 |
Belleville Spring Lock Washers
Also known as conical washers, these have a slightly cupped shape that gives them spring-like flexibility to grip tighter than split and tooth lock washers. They minimize loosening from wear, temperature changes, and vibration. Load-rated Belleville disc springs are also available.
18-8 stainless steel and 17-7 PH stainless steel washers have good chemical resistance and may be mildly magnetic. 17-7 PH stainless steel washers are stronger than 18-8 stainless steel washers.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Overall Ht. | Hardness | Pkg. Qty. | Pkg. | |
17-7 PH Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| M6 | 6.400mm | 14.000mm | 1.200mm | 1.700mm | Rockwell C38 | 5 | 000000000 | 00000 |
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. Made of steel, they’re 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 | 30.0 | 50.0 | 1.20 | 7.0 | 2.5 | 5.0 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 00000 |
| M32 | 32.0 | 52.0 | 1.20 | 7.0 | 2.5 | 5.0 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
| M35 | 35.0 | 55.0 | 1.20 | 7.0 | 2.5 | 5.0 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
| M38 | 38.0 | 58.0 | 1.20 | 8.0 | 2.5 | 5.0 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
| M40 | 40.0 | 62.0 | 1.20 | 8.0 | 2.5 | 5.0 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
| M42 | 42.0 | 62.0 | 1.20 | 8.0 | 2.5 | 5.0 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
| M45 | 45.0 | 68.0 | 1.20 | 8.0 | 2.5 | 5.0 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
| M48 | 48.0 | 75.0 | 1.20 | 8.0 | 2.5 | 5.0 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 0000 |
| M50 | 50.0 | 75.0 | 1.20 | 8.0 | 2.5 | 5.0 | 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 | Rockwell C42 | 100 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||
| M5 | 5.3 | 11.0 | 1.2 | 1.60 | Rockwell C42 | 25 | 000000000 | 0000 |
316 Stainless Steel | ||||||||
| M5 | 5.3 | 11.0 | 1.2 | 1.60 | Rockwell C42 | 10 | 000000000 | 0000 |
Metric Tab Lock Washers
Bend the tab of these metric lock washers against the flats of a hex nut or bolt head to prevent the fastener and washer from turning and loosening due to vibration, wear, or changes in temperature. Their partial cone shape gives these washers spring-like flexibility, so they distribute force and grip tighter than split and tooth lock washers. All meet DIN 432, an international standard for tab washer dimensions.
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 | Specifications Met | Pkg. Qty. | Pkg. | |
Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| M12 | 13 | 30 | 4.5 | 1.2 | 4.5 | Rockwell B50 | DIN 432 | 5 | 000000000 | 00000 |
| M14 | 15 | 33 | 4.5 | 1.2 | 4.5 | Rockwell B50 | DIN 432 | 1 | 000000000 | 0000 |
| M16 | 17 | 36 | 4.5 | 1.2 | 5.5 | Rockwell B50 | DIN 432 | 1 | 000000000 | 0000 |
| M18 | 19 | 40 | 4.5 | 1.2 | 6.5 | Rockwell B50 | DIN 432 | 1 | 000000000 | 0000 |
316 Stainless Steel | ||||||||||
| M12 | 13 | 30 | 4.5 | 1.2 | 4.5 | Not Rated | DIN 432 | 10 | 000000000 | 00000 |
| M14 | 15 | 33 | 4.5 | 1.2 | 4.5 | Not Rated | DIN 432 | 5 | 000000000 | 00000 |
| M16 | 17 | 36 | 4.5 | 1.2 | 5.5 | Not Rated | DIN 432 | 5 | 000000000 | 00000 |
| M18 | 19 | 40 | 4.5 | 1.2 | 6.5 | Not Rated | DIN 432 | 1 | 000000000 | 0000 |
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.