About Washers
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Metric Electrical-Insulating Plastic Washers
These washers are excellent electrical insulators.
Glass-filled nylon washers are reinforced with glass for increased strength. Exposure to moisture may cause them to expand.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thick., mm | Max. Temperature, °F | Hardness | Specifications Met | Pkg. Qty. | (Print) _temp | Pkg. | |
Glass-Filled Nylon Plastic | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
White | ||||||||||
M16 | 17 | 30.0 | 3 | 220° | Rockwell M111 | UL 94 HB | 1 | x | 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.
Steel washers are strong and flexible.
Washers with external teeth grip components using their teeth, in addition to spring tension.
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 Chamfered Nuts—with External Teeth | |||||||||||
M220 | 220.000 | 292.000 | 3.000 | 24.000 | 7.000 | 13.000 | Not Rated | DIN 5406 | DIN 981 | 000000000 | 0000000 |
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 | ||||||||
M12 | 13.0 | 29.0 | 3.0 | 4.00 | Rockwell C42 | 10 | 000000000 | 000000 |
Zinc-Plated Steel | ||||||||
M12 | 13.0 | 29.0 | 3.0 | 4.00 | Rockwell C42 | 5 | 000000000 | 00000 |
Black-Phosphate Steel | ||||||||
M12 | 13.0 | 29.0 | 3.0 | 3.95 | Not Rated | 10 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||
M12 | 13.0 | 29.0 | 3.0 | 4.00 | Not Rated | 10 | 000000000 | 0000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
M12 | 13.0 | 29.0 | 3.0 | 3.95 | Rockwell C35 | 5 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
M12 | 13.0 | 29.0 | 3.0 | 4.00 | Not Rated | 1 | 000000000 | 0000 |
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 | |||||||||
M20 | 20.2 | 33.6 | 3.0 | 5.1 | Not Rated | DIN 128A | 10 | 000000000 | 000000 |
M22 | 22.5 | 35.9 | 3.0 | 5.1 | Not Rated | DIN 128A | 5 | 000000000 | 00000 |
Zinc-Plated Steel | |||||||||
Curved | |||||||||
M20 | 20.2 | 33.6 | 3.0 | 5.1 | Rockwell C44 | DIN 128A | 10 | 000000000 | 00000 |
M22 | 22.5 | 35.9 | 3.0 | 5.1 | Rockwell C44 | DIN 128A | 10 | 000000000 | 00000 |
Wave | |||||||||
M22 | 22.5 | 35.9 | 3.0 | 5.1 | Rockwell C44 | DIN 128B | 5 | 000000000 | 0000 |
Zinc Yellow-Chromate Plated Steel | |||||||||
Curved | |||||||||
M20 | 20.2 | 33.6 | 3.0 | 5.1 | Rockwell C44 | DIN 128A | 10 | 000000000 | 00000 |
Black-Oxide Steel | |||||||||
Curved | |||||||||
M20 | 20.2 | 33.6 | 3.0 | 5.1 | Rockwell C44 | DIN 128A | 5 | 000000000 | 0000 |
Metric Leveling Washers for I-Beams
Commonly called beveled washers, these metric washers are tapered to fit inside an I-beam's flange to provide a parallel bearing surface.
Zinc-plated steel washers are coated for corrosion resistance in wet environments.
Hot-dipped galvanized steel washers are ten times more corrosion resistant than zinc-plated washers.
18-8 stainless steel washers are the most corrosion-resistant option.
For technical drawings and 3-D models, click on a part number.
Thick., mm | |||||||||
---|---|---|---|---|---|---|---|---|---|
For Screw Size | ID, mm | Wd., mm | (A) | (B) | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||
M20 | 22.0 | 40.0 | 9.2 | 3.0 | Rockwell B52 | DIN 435 | 5 | 000000000 | 000000 |
M24 | 26.0 | 56.0 | 10.8 | 3.0 | Rockwell B52 | DIN 435 | 1 | 000000000 | 00000 |
Hot-Dipped Galvanized Steel | |||||||||
M20 | 22.0 | 40.0 | 9.2 | 3.0 | Rockwell B52 | DIN 435 | 1 | 000000000 | 0000 |
M24 | 26.0 | 56.0 | 10.8 | 3.0 | Rockwell B52 | DIN 435 | 1 | 000000000 | 0000 |
18-8 Stainless Steel | |||||||||
M20 | 22.0 | 40.0 | 9.2 | 3.0 | Rockwell B52 | DIN 435 | 1 | 000000000 | 00000 |
M24 | 26.0 | 56.0 | 10.8 | 3.0 | Rockwell B52 | DIN 435 | 1 | 000000000 | 00000 |
Leveling Washers for U-Channels
Tapered to fit in a U-channel, these washers create a parallel bearing surface. They have a zinc-plated finish, so they resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Thick., mm | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | ID, mm | Lg., mm | Wd., mm | (A) | (B) | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||||
M16 | 18.0 | 36.0 | 32.0 | 5.9 | 3.0 | Rockwell B56 | DIN 434 | 5 | 000000000 | 000000 |