5/16 Inch Black Split Lock Washer 100 Pack With Black Ruspert 1000 Coating For 5/16 Inch Fasteners Prevents Loosening And Vibration Outside Diameter 0.593 Inches Inner Diameter 0.314 To 0.322 Inches Thickness 0.078 Inches Meets ASME B18.21.1

High-performance 5/16 inch split lock washers in a 100 pack for vibration-resistant fastening
✔️ 5/16 inch size with 0.593 inch OD, 0.314-0.322 inch ID, 0.078 inch thickness, and corrosion-resistant coating for 100 fasteners

This split lock washer is a simple metal ring with a split design that adds tension to nuts and bolts, keeping them secure in spots like automotive engines, machinery setups, and construction projects where things shake a lot.

✅ 5/16 inch size fits standard fasteners perfectly
✅ Outside diameter measures 0.593 inches
✅ Inside diameter ranges from 0.314 to 0.322 inches
✅ Thickness is at least 0.078 inches for durability
✅ Black Ruspert 1000 coating offers strong corrosion protection
✅ Comes in a handy pack of 100 washers for bulk jobs

💡 Why do split lock washers matter for preventing fastener issues in machinery?
Split lock washers are key for holding things steady in tough spots.
They create tension that stops nuts from spinning loose.
- Reduces vibration-related failures in engines and frames
- Boosts reliability for everyday repairs and builds
- Saves time by minimizing the need for constant checks
- Works with common bolt types to handle various loads