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Standard Fasteners
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Application-Specific Fasteners
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Non-Standard Custom Fasteners
Bolts
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Washers
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Riveting Technology
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CNC Lathe Parts 
4.8 grade environmentally friendly zinc hexagon head flat spring washer combination screw GB/T 9074.
Dimensions: M3-M12
Standard Designation: GB/T 9074.17
Material Grade: Carbon Steel
Head Style: Hex Head Bolt
GB/T 9074.17
Spring washers are used to prevent loosening, and flat washers are used to increase the contact area to prevent damage by the installation surface. Combination screws are widely used in electrical, power, machinery, electronics, household appliances, furniture, ships, etc.
