Products Description

Hardened Flat Washers undergo a through-hardening and tempering process, resulting in extremely high surface hardness, compressive stiffness, and wear resistance. When installed between bolts/nuts and the workpiece surface, they increase the load-bearing contact area, distribute clamping force, protect the base material from indentation damage, and enhance frictional locking force to resist loosening under high pressure, vibration, and cyclic shock. It is a critical supporting fastener for heavy machinery, automotive chassis, steel structures, mining equipment and high-pressure industrial connection systems.

Parameter

Standard	DIN125
Name	Hardened flat washers
Material	carbon steel and alloy steel, etc.
Grade	Grade 8.8, 10.9
Nominal Diameter	M2-M48
Surface treatment	ZP,YZ,BLACK
Alias	Hardened Flat Washers, Hardened Flat Washers

Core Working Principle

Place the hardened washer between the fastener head and the fastened workpiece;

When tightening the bolt, the washer expands the force-bearing area to evenly spread concentrated axial pressure;

High hardness prevents the washer itself from plastic deformation and thinning under high torque, maintaining stable pre-tightening force permanently;

Hardened smooth surface increases friction coefficient between contact surfaces, suppressing nut rotation loosening caused by mechanical vibration and temperature change.

Exhibition

Quality Control & Custom Service

Every batch of products complies with DIN industrial safety standards. Customization options include special thicknesses, custom inner/outer diameters, high-temperature-resistant coatings, laser marking, and OEM bulk export packaging. Standard moisture-proof cartons and wooden pallets ensure safe transport during long-distance sea and land shipments, supporting both small-batch trial orders and large-scale engineering bulk purchases.
Please contact us for detailed dimension specifications, load capacity data, and competitive wholesale pricing.

Fast delivery for urgent projects