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Large Flat Washer DIN 9021

Large Flat Washer DIN 9021
Product Information
A large flat washer is a type of washer that is commonly used in various industries for heavy-duty applications. It serves multiple functions in different machines and equipment. It is used to distribute load, act as a spacer, and provide a smooth surface for rotating and moving parts.
The washer is manufactured using a range of materials including steel, stainless steel, copper, and plastic. The size of the washer varies depending on the intended use. The thickness and diameter of the washer are designed to accommodate the specific needs of the machine.
The main function of a large flat washer is to distribute load. It helps in distributing force over a larger surface area, resulting in reduced stress on the machine or equipment. This not only enhances the lifespan of the machine but also helps in preventing premature failure of individual components.
In addition to the load distribution, a large flat washer may also act as a spacer. In some applications, the washer is used to adjust the distance between two parts, which ensures proper alignment of the equipment. By maintaining the exact distance between two parts, it helps in preventing damage to individual components.
Apart from these functions, a large flat washer can also provide a smooth surface for rotating and moving parts. When a machine is in operation, certain components rotate or move against each other, which can lead to wear and tear. A large flat washer helps in providing a friction-free surface, reducing the chances of damage to the machine.
In conclusion, a large flat washer is an essential component in heavy-duty applications. It serves multiple functions to ensure proper alignment and operation of machines. Its ability to distribute load, act as a spacer, and provide smooth surface makes it a crucial component for maintaining the quality and durability of equipment. Therefore, choosing the right large flat washer is vital for a successful and long-lasting operation of your heavy-duty application.
Flat Washer Dimensions
Table W1 | ||||
|---|---|---|---|---|
| Bolts Size | A O.D. | B I.D. | C Thickness | |
| Min | Max | |||
| 1/4″ | 5/8 | 9/32 | 0.051 | 0.080 |
| 5/16″ | 11/16 | 11/32 | 0.051 | 0.080 |
| 3/8″ | 13/16 | 13/32 | 0.051 | 0.080 |
| 7/16″ | 59/64 | 15/32 | 0.051 | 0.080 |
| 1/2″ | 1-1/16 | 17.32 | 0.097 | 0.177 |
| 5/8″ | 1-5/16 | 11/16 | 0.122 | 0.177 |
| 3/4″ | 1-15/32 | 13/16 | 0.122 | 0.177 |
| 7/8″ | 1-3/4 | 15/16 | 0.136 | 0.177 |
| 1″ | 2 | 1-1/8 | 0.136 | 0.177 |
| 1-1/8″ | 2-1/4 | 1-1/4 | 0.136 | 0.177 |
| 1-1/4″ | 2-1/2 | 1-3/8 | 0.136 | 0.177 |
| 1-3/8″ | 2-3/4 | 1-1/2 | 0.136 | 0.177 |
| 1-1/2″ | 3 | 1-5/8 | 0.136 | 0.177 |
| 1-3/4″ | 3-3/8 | 1-7/8 | 0.178 | 0.28 |
| 2″ | 3-3/4 | 2-1/8 | 0.178 | 0.28 |
| 2-1/4″ | 4 | 2-3/8 | 0.24 | 0.34 |
| 2-1/2″ | 4-1/2 | 2-5/8 | 0.24 | 0.34 |
| 2-3/4″ | 5 | 2-7/8 | 0.24 | 0.34 |
| 3″ | 5-1/2 | 3-1/8 | 0.24 | 0.34 |
| 3-1/4″ | 6 | 3-3/8 | 0.24 | 0.34 |
| 3-1/2″ | 6-1/2 | 3-5/8 | 0.24 | 0.34 |
| 3-3/4″ | 7 | 3-7/8 | 0.24 | 0.34 |
| 4″ | 7-1/2 | 4-1/8 | 0.24 | 0.34 |
Table W2 | ||||
|---|---|---|---|---|
| Bolts Size | A O.D. | B I.D. | C Thickness | |
| Min | Max | |||
| 1/4″ | 3/4 | 5/16 | 0.051 | 0.080 |
| 5/16″ | 7/8 | 3/8 | 0.064 | 0.104 |
| 3/8″ | 1 | 7/16 | 0.064 | 0.104 |
| 7/16″ | 1-1/4 | 1/2 | 0.064 | 0.104 |
| 1/2″ | 1-3/8 | 9/16 | 0.086 | 0.132 |
| 9/16″ | 1-1/2 | 5/8 | 0.086 | 0.132 |
| 5/8″ | 1-3/4 | 11/16 | 0.108 | 0.160 |
| 3/4″ | 2 | 13/16 | 0.122 | 0.177 |
| 7/8″ | 2-1/4 | 15/16 | 0.136 | 0.192 |
| 1″ | 2-1/2 | 1-1/16 | 0.136 | 0.192 |
| 1-1/8″ | 2-3/4 | 1-1/4 | 0.136 | 0.192 |
| 1-1/4″ | 3 | 1-3/8 | 0.136 | 0.192 |
| 1-3/8″ | 3-1/4 | 1-1/2 | 0.153 | 0.213 |
| 1-1/2″ | 3-1/2 | 1-5/8 | 0.153 | 0.213 |
Table W3 | ||||
|---|---|---|---|---|
| Bolts Size | A O.D. | B I.D. | C Thickness | |
| 1/8″ | 3/8 | 5/32 | 3/64 | |
| 5/32″ | 7/16 | 3/16 | 3/64 | |
| 3/16″ | 1/2 | 7/32 | 3/64 | |
| 7/32″ | 9/16 | 1/4 | 3/64 | |
| 1/4″ | 5/8 | 9/32 | 1/16 | |
| 5/16″ | 11/16 | 11/32 | 1/16 | |
| 3/8″ | 13/16 | 13/32 | 1/16 | |
| 7/16″ | 59/64 | 15/32 | 1/16 | |
| 1/2″ | 1-1/16 | 17/32 | 3/32 | |
| 9/16″ | 1-3/16 | 19/32 | 3/32 | |
| 5/8″ | 1-5/16 | 21/32 | 3/32 | |
| 3/4″ | 1-1/2 | 13/16 | 9/64 | |
| 7/8″ | 1-3/4 | 15/16 | 9/64 | |
| 1″ | 2 | 1-1/16 | 9/64 | |
| 1-1/8″ | 2-1/4 | 1-1/4 | 9/64 | |
| 1-1/4″ | 2-1/2 | 1-3/8 | 5/32 | |
| 1-3/8″ | 2-3/4 | 1-1/2 | 5/32 | |
| 1-1/2″ | 3 | 1-5/8 | 5/32 | |
Table W4 | ||||
|---|---|---|---|---|
| Bolts Size | A O.D. | B I.D. | C Thickness | |
| 3/16″ | 9/16 | 1/4 | 3/64 | |
| 1/4″ | 3/4 | 5/16 | 1/16 | |
| 5/16″ | 7/8 | 3/8 | 5/64 | |
| 3/8″ | 1 | 7/16 | 5/64 | |
| 7/16″ | 1-1/4 | 1/2 | 5/64 | |
| 1/2″ | 1-3/8 | 9/16 | 7/64 | |
| 9/16″ | 1-1/2 | 5/8 | 7/64 | |
| 5/8″ | 1-3/4 | 11/16 | 9/64 | |
| 3/4″ | 2 | 13/16 | 5/32 | |
| 7/8″ | 2-1/4 | 15/16 | 11/64 | |
| 1″ | 2-1/2 | 1-1/16 | 11/64 | |
| 1-1/8″ | 2-3/4 | 1-1/4 | 11/64 | |
| 1-1/4″ | 3 | 1-3/8 | 11/64 | |
| 1-3/8″ | 3-1/4 | 1-1/2 | 3/16 | |
| 1-1/2″ | 3-1/2 | 1-5/8 | 3/16 | |
| 1-5/8″ | 3-3/4 | 1-3/4 | 3/16 | |
| 1-3/4″ | 4 | 1-7/8 | 3/16 | |
| 1-7/8″ | 4-1/4 | 2 | 3/16 | |
| 2″ | 4-1/2 | 2-1/8 | 3/16 | |
| 2-1/4″ | 4-3/4 | 2-3/8 | 7/32 | |
| 2-1/2″ | 5 | 2-5/8 | 15/64 | |
| 2-3/4″ | 5-1/4 | 2-7/8 | 1/4 | |
| 3″ | 5-1/2 | 3-1/8 | 17/64 | |
Common Fastener Materials
Fasteners are fabricated from a variety of materials. These options include metals and polymers. Stainless steel offers strength and corrosion resistance. While polymer options have less strength than stainless, they are a good choice for resisting chemicals. The most common materials are:
- Stainless steel
- Alloy steel
- Low carbon steel
- Medium carbon steel
- Titanium
- Polymers, such as nylon
Finish Options
The use of heat treatments and application of various finishes, also known as “plating,” affects the look and performance of fasteners. Finishes provide material stability and protect the fasteners from corrosion and rust. Below are some common heat treatment and finish benefits:
- Zinc coating – Most common, low cost, resists corrosion and rust
- Galvanized – Superior corrosion protection, anti-seize, higher upfront investment
- Stainless – Great for humid environments, strong, ideal for electrical or mechanical uses
- Black – Adds color, provides better grip, deflects light
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