[30000 BULK] Medium Split Lock Washers Steel Black Oxide 4

Ensure tight, vibration-resistant fastening with our Medium Split Lock Washers Steel Black Oxide 4. This washer combines robust steel construction with a durable black oxide finish to provide dependable performance in a range of applications.

Size 4 and type medium split lock washer deliver reliable clamping force while accommodating slight misalignments, making them ideal for automotive, machinery, and general hardware assemblies.

Key features

• Material: Steel
• Finish: Black oxide for a uniform appearance and added surface protection
• Type: Medium split lock washer that resists loosening under vibration
• Size: 4
• Applications: Suitable for mechanical assemblies, automotive, and industrial hardware

Why choose these washers

Split lock washers are designed to bite into both the bolt head and the mating surface, creating a spring action that helps prevent loosening when exposed to vibration and dynamic loads. The steel construction provides strength, while the black oxide finish offers a corrosion-resistant layer and a non-reflective appearance for clean, professional installations.

Usage tips

Pair with compatible bolts and nuts of the same grade, tighten to the recommended torque, and ensure the washer seats flat against the surface for optimal performance. Replace if deformed or worn.