M4 Spring Washer Mild Steel Black Oxide (Dia. 4.2mm)

Inner Diameter (ID): 4.2 mm
Material: Mild Steel
Surface Finish: Black Oxide
Compatible Fasteners: M4 Screws, Bolts and Nuts

Mild steel spring washer featuring a split helical design that compresses under tightening to provide spring tension within bolted joints. Its raised split ends create additional friction against mating surfaces, helping resist loosening in suitable fastening applications. The black oxide finish provides a uniform dark appearance and basic surface protection.

Applications

• Machinery and mechanical assemblies
• Electrical panels and enclosures
• Automotive components
• Equipment mounting and fastening
• General industrial hardware