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Metric General Purpose Washers
Use these metric washers to evenly distribute the load under bolt or screw heads and nuts when fastening. They can also act as spacers.
Stainless steel washers are more corrosion resistant than steel washers, and almost as strong. 18-8 and 17-7 PH stainless steel washers will hold up in humid, damp, and washdown environments, but will corrode if exposed to salt water or chemicals. 17-7 PH stainless steel washers are stronger than 18-8 stainless steel. More corrosion resistant than 18-8 and 17-7 PH stainless steel, 316 stainless steel washers will not corrode from salt water, chlorine solutions, and chemicals.
Steel washers are stronger and more wear resistant than stainless steel washers. Steel washers without a plating or coating are best for dry environments, since moisture will cause them to rust. Zinc- and zinc yellow-chromate plated steel washers have an outer layer of zinc that protects the inner steel from rust and extends the life of the washer. Although they are stronger and more wear resistant than stainless steel, they are not as corrosion resistant. Use them in wet environments, but avoid contact with salt water and chemicals.
Washers that meet ISO 7089, 7090, 7091, and 7092 (formerly DIN 125, 126, and 433), meet international standards for fastener dimensions. The ISO 7091 washers have a slightly rougher surface than a typical flat washer.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thickness, mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
---|---|---|---|---|---|---|---|---|
M42 | 43.0 | 78.0 | 6.0-8.0 | Not Rated | DIN 125; ISO 7089 | 1 | 000000000 | 00000 |
316 Stainless Steel | ||||||||
M42 | 43.0 | 78.0 | 6.0-8.0 | Not Rated | DIN 125; ISO 7089 | 1 | 000000000 | 00000 |
Steel | ||||||||
M42 | 45.0 | 78.0 | 5.8-8.2 | Rockwell B52 | DIN 126; ISO 7091 | 1 | 000000000 | 0000 |
Zinc-Plated Steel | ||||||||
M42 | 43.0 | 78.0 | 6.0-8.0 | Rockwell B75 | DIN 125; ISO 7090 | 1 | 000000000 | 0000 |
Zinc-Plated Class 8.8 Steel | ||||||||
M42 | 43.0 | 78.0 | 6.0-8.0 | Rockwell B91 | DIN 125; ISO 7089 | 1 | 000000000 | 00000 |
Metric Chemical-Resistant Plastic Washers
These washers surpass most other plastic washers when it comes to withstanding chemicals, oil, and grease. All are excellent electrical insulators.
PTFE washers withstand high temperatures and have a slippery surface that resists wear in high-friction applications.
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 | Color | Pkg. Qty. | Pkg. | |
PTFE Plastic | |||||||||
---|---|---|---|---|---|---|---|---|---|
M42 | 43.0 | 78.0 | 1.4-1.8 | 500° | Durometer 51D | White | 1 | 000000000 | 000000 |
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.
Standard split lock washers have a left-hand helix that have right-hand threads to prevent clockwise rotation. They have uneven split ends that bite into fasteners for a tight grip but won’t work with hardened surfaces. They hold better than curved or wave washers. These washers are not reusable after tightening.
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.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thick., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||
---|---|---|---|---|---|---|---|---|
Standard | ||||||||
M42 | 43.7 | 68.2 | 6.8-7.2 | Rockwell C44 | DIN 127B | 1 | 000000000 | 000000 |
Metric Split Lock Washers for Socket Head Screws
Also known as high-collar lock washers, these metric washers have smaller outside diameters than standard split lock washers to fit neatly under socket head cap screws. As the screw is tightened, these washers flatten to add tension to the joint. They counteract fatigue around the joint from small amounts of vibration, making them a common choice to prevent fasteners from loosening. However, they resist the least amount of vibration compared to other locking washers.
These washers are compatible with fasteners that have right-hand threads to prevent clockwise rotation. The uneven split ends bite into fasteners for a tight grip, but they won’t work with hardened surfaces. These washers hold better than curved or wave washers. They are not reusable after tightening.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID, mm | OD, mm | Thick., mm | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Steel | ||||||||
---|---|---|---|---|---|---|---|---|
M42 | 43.7 | 60.2 | 7.7-8.3 | Rockwell C44 | DIN 7980 | 1 | 000000000 | 000000 |
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 | |||||||||||
M42 | 42.000 | 62.000 | 1.200 | 8.000 | 2.500 | 5.000 | Not Rated | DIN 462 | DIN 1804 | 000000000 | 00000 |
Wedge Lock Washers
These two-piece washers provide more locking power than split, tooth, and spring lock washers. Wedges on the inside lock the two pieces together, and serrations on the exterior grip surfaces to resist loosening from high vibration and shifting. Washers are reusable.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
Zinc-flake-coated steel washers are corrosion resistant in wet environments.
316 stainless steel and zinc-flake-coated steel washers are comparable to NORD-LOCK® Series washers.
For technical drawings and 3-D models, click on a part number.
Metal Sealing Washers
Also known as crush washers, these compress when tightened to form a tighter, more durable seal than rubber washers. They are commonly used to seal fluids such as oil and fuel. Washers are not reusable.
Copper washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive. Cellulose-filled copper washers are for low-torque applications since they’re easier to crush than standard copper washers.
Aluminum washers are lightweight and corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.