5/8 5/16-18 Stainless steel square washer SS304 SS316 A2 A4-81 Customized Size Plain surface

Square washers and round washers are common fasteners used for connecting gaps and distributing stress between bolts, nuts, and connecting parts. They help reduce friction, limit deformation, transfer pressure, and prevent air/liquid leakage.

• Shape: Square washers have equal side lengths with 90-degree angles; round washers have uniform circumferential edges
• Applications: Square washers are ideal for square/regular structural connections and bolt holes, particularly in track connections like angles, I-beams, and rails
• Materials: Available in various metals (steel, copper, aluminum) and non-metallic materials (rubber, silicone) for different working conditions
• Stress Distribution: Round washers distribute stress more uniformly; square washers may concentrate force at corners
• Torque Control: Round washers offer easier torque control during installation due to uniform pressure distribution

Etching is a precision manufacturing process that removes unwanted material with corrosive solutions, ideal for medium-volume production (several hundred pieces). Benefits include:

• No burrs or deformation
• High precision
• Lower initial costs (no expensive fixtures required)

The process involves applying photoresist, masking, light exposure, corrosion of exposed metal, and final cleaning/drying.

• Clean regularly with mild detergents and soft cloths
• Avoid acidic/alkaline cleaners that may damage surfaces
• For stubborn stains, use specialized stainless steel cleaners or alcohol/vinegar solutions