About Washers
More
Split Lock Washers
As a screw is tightened, these 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.
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.
Black-oxide steel washers are mildly corrosion resistant in dry environments.
316 stainless steel washers have excellent resistance to chemicals and salt water. They may be mildly magnetic.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
Zinc- and zinc yellow-chromate plated steel washers are corrosion resistant in wet environments.
Zinc-flake-coated steel washers are 40 times as corrosion resistant as zinc-plated washers and comparable to Magni-coated washers.
Washers that meet ASME B18.21.1 adhere to strict dimensional standards. Steel washers also meet standards for material properties.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Steel | ||||||||
---|---|---|---|---|---|---|---|---|
9/16" | 0.574" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1 | 10 | 00000000 | 00000 |
316 Stainless Steel | ||||||||
9/16" | 0.574" | 0.965" | 0.141" | Rockwell C35 | ASME B18.21.1 | 25 | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||
9/16" | 0.574" | 0.965" | 0.141" | Rockwell C35 | ASME B18.21.1 | 25 | 000000000 | 0000 |
Zinc-Plated Steel | ||||||||
9/16" | 0.574" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1 | 100 | 000000000 | 00000 |
Zinc Yellow-Chromate Plated Grade 8 Steel | ||||||||
9/16" | 0.574" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1 | 50 | 000000000 | 00000 |
Zinc-Flake-Coated Steel | ||||||||
9/16" | 0.574" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1 | 5 | 00000000 | 0000 |
Steel | ||||||||
9/16" | 0.574" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1 | 50 | 000000000 | 0000 |
Mil. Spec. Split Lock Washers
Choose these washers for their adherence to strict military standards for material and construction. As a screw is tightened, they flatten to add tension to the joint and prevent loosening from small amounts of vibration.
18-8 stainless steel washers have excellent corrosion resistance in most environments. They may be mildly magnetic.
Passivated stainless steel washers have added protection against oxidation and corrosion. Black-oxide stainless steel washers have a matte-black finish.
Cadmium- and zinc yellow-chromate plated steel washers are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Passivated 18-8 Stainless Steel | ||||||||
---|---|---|---|---|---|---|---|---|
MS35338 | ||||||||
9/16" | 0.564" | 0.965" | 0.141" | Rockwell C35 | ASME B18.21.1; MS35338-144 | 10 | 000000000 | 00000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
MS35338 | ||||||||
9/16" | 0.564" | 0.965" | 0.141" | Rockwell C35 | ASME B18.21.1; MS35338-144 | 2 | 000000000 | 0000 |
Cadmium-Plated Steel | ||||||||
MS35338 | ||||||||
9/16" | 0.564" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1; MS35338-49 | 5 | 000000000 | 0000 |
Zinc Yellow-Chromate Plated Steel | ||||||||
MS35338 | ||||||||
9/16" | 0.564" | 0.965" | 0.141" | Rockwell C38 | ASME B18.21.1; MS35338-49 | 10 | 000000000 | 0000 |
Leveling Washers for I-Beams
Commonly called beveled washers, these are tapered to fit inside an I-beam's flange to provide a parallel bearing surface.
Black-oxide iron washers have a matte-black finish that prevents corrosion in dry environments.
Hot-dipped galvanized iron washers are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.