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Standard Fasteners
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Stainless steel cross recessed pan head screw flat washer and spring washer combination
Dimensions: M3-M10
Standard Designation: GB/T 9074.4-1988
Material Grade: 304Stainless steel
Head Style: Pan head
GB/T 9074.4-1988
Washers are divided into flat washers and spring washers. After the screw is tightened, the contact area with the workpiece is small. Adding a flat washer can increase the pressure-bearing area of the workpiece, so that the workpiece will not be damaged or threaded. The spring washer mainly increases the friction coefficient between the screw and the workpiece to prevent the screw from loosening.




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