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Machined Flat Washer, 4140 Steel, Through Hardened, Black Oxide, Round Shape, USA Made
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ASIN B004Q9TSPE
Specifications for this item
- Brand Name
- Small Parts
- Finish Types
- Black Oxide
- Inside Diameter Tolerance
- Plus/Minus 0.002 inches
- Material Type
- 4140 Alloy Steel
- Part Number
- B004Q9TSPE
- System of Measurement
- Inch
- Thickness Tolerance
- Plus/Minus 0.002 inches
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Key Features
- Machined flat washers have straight sides without any die break for strength
- 4140 alloy steel is hardened to Rockwell C40-C50, suitable when high strength is needed
- Black-oxide coating helps reduce friction and provides mild corrosion resistance
- Tight tolerance for precision fastening
Product Description
The flat round washer is fully machined and manufactured from 4140 alloy steel that is hardened to Rockwell C40-C50 and coated with black oxide for lubricity. Its tight dimensional tolerances make it suitable for precision applications.
The washer is made from 4140 steel, a chromium-molybdenum steel alloy. The benefits of alloy steel include its tensile strength, yield strength, fatigue resistance, toughness, and wear resistance. Steels are designated by a four-number SAE Steel grade. The first two digits indicate the primary materials used to form the steel. The last two digits identify the percentage of carbon for the alloy (in hundredths). The black oxide coating provides some lubricity to the product, meaning that there is less friction generated when using these products. The coating also provides a mild corrosion resistance but should not be relied on in environments where corrosion resistance is a primary concern. The washer’s size corresponds to matching screw or bolt size. Washer is made in the USA.
Washers have a variety of purposes. They can distribute the load of a threaded fastener and can also be used as spacers, springs, shims, and locking devices. Washers can be measured in inches or in millimeters, and typically have an outer diameter about twice as large as the inner diameter.
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