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Mil. Spec. Washers
Choose these washers for their adherence to strict military standards for material and construction.
Cadmium- and zinc yellow-chromate plated steel washers are corrosion resistant in wet environments.
Aluminum washers are lightweight and have good corrosion resistance. 1100 aluminum washers are made of an aluminum that is commercially pure, so they have excellent corrosion resistance and electrical conductivity. However, they’re not as strong as 2024 aluminum. They are commonly used in the chemical and food processing industry. 2024 aluminum washers are easy to machine. They are stronger and resist wear better than 1100 aluminum. They are commonly used in the aircraft industry and in veterinary and orthopedic equipment.
For technical drawings and 3-D models, click on a part number.
| For Screw Size  | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium-Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
MS27183 | ||||||||
| 1 5/8" | 1.750" | 3.750" | 0.153"-0.213" | Not Rated | MS27183-33; ASME B18.21.1 | 1 | 000000000 | 000000 |
1100 Aluminum | ||||||||
AN901 | ||||||||
| 1 5/8" | 1.630" | 1.870" | 0.048"-0.054" | Brinell 32 | AN901-20A | 10 | 000000000 | 00000 |
2024 Aluminum | ||||||||
NAS1149 | ||||||||
| 1 5/8" | 1.640" | 2.375" | 0.083"-0.097" | Not Rated | NAS1149-D2690H; AN960-D2616 | 5 | 000000000 | 00000 |
SAE Washers
SAE washers generally have a smaller ID and OD than USS washers.
Zinc-plated, zinc yellow-chromate plated, and chrome-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. | |
Zinc Yellow-Chromate Plated Grade 8 Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 5/8" | 1.750" | 3.750" | 0.153"-0.213" | Rockwell C38 | ASME B18.21.1 | 1 | 000000000 | 00000 |
USS Washers
USS washers generally have a larger ID and OD than SAE washers.
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. Black-oxide washers have a matte-black finish.
Zinc-plated steel washers are corrosion resistant in wet environments.
Hot-dipped galvanized steel washers are 10 times as corrosion resistant as zinc-plated washers.
Black corrosion-resistant-coated steel washers resist chemicals and withstand 1,000 hours of salt spray.
For technical drawings and 3-D models, click on a part number.
| For Screw Size | ID | OD | Thick. | Hardness | Specifications Met | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 5/8" | 1.750" | 3.750" | 0.153"-0.213" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 000000 |
18-8 Stainless Steel | ||||||||
| 1 5/8" | 1.750" | 3.750" | 0.153"-0.213" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 00000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
| 1 5/8" | 1.750" | 3.750" | 0.153"-0.213" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 00000 |
Zinc-Plated Steel | ||||||||
| 1 5/8" | 1.750" | 3.750" | 0.153"-0.213" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 00000 |
Hot-Dipped Galvanized Steel | ||||||||
| 1 5/8" | 1.750" | 3.750" | 0.153"-0.213" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 00000 |
Black Corrosion-Resistant-Coated Steel | ||||||||
| 1 5/8" | 1.750" | 3.750" | 0.153"-0.213" | Not Rated | ASME B18.21.1 | 1 | 000000000 | 0000 |
Steel | ||||||||
| 1 5/8" | 1.750" | 3.750" | 0.153"-0.213" | Not Rated | ASME B18.21.1 | 5 | 000000000 | 00000 |
Washers for Structural Applications
Designed for use with structural screws, studs, and nuts, these washers are often used for construction and exterior building applications.
Hot-dipped galvanized washers are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
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 loosening. 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.
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.
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.
Leveling Washers
Also known as spherical washers, these consist of a male and female washer that, when nested, swivel slightly to compensate for tolerance variations and uneven surfaces. They're good for die and fixturing applications.
18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.
Black-oxide steel washers are mildly corrosion resistant in dry environments.
For technical drawings and 3-D models, click on a part number.
Washers | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Male | Female | Replacement Male Washers | Replacement Female Washers | ||||||||||||
| For Screw Size | ID (A) | OD (B) | Radius | ID (C) | OD (D) | Radius | Thick. (E) | Max. Angle of Correction | Hardness | Each | Each | Each | |||
18-8 Stainless Steel | |||||||||||||||
| 1 5/8" | 1.687" | 3.250" | 3.500" | 1.750" | 3.250" | 3.500" | 0.673"-0.703" | 3° | Rockwell B80 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 |
Black-Oxide Steel | |||||||||||||||
| 1 5/8" | 1.687" | 3.250" | 3.500" | 1.750" | 3.250" | 3.500" | 0.673"-0.703" | 3° | Rockwell C48 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 |