235 Piece Black Starlock Internal Tooth Lock Washers Set In 8 Sizes M2 M3 M4 M5 M6 M8 M10 M12, 65Mn Steel, Storage Box, All In One Assortment For Auto Machinery DIY Projects

235-Piece Black Starlock Lock Washers: M2-M12
✔️ Includes 8 sizes (M2-M12) in a 235pc set in one storage box

This is an internal tooth starlock washer set in black finish, made from 65Mn steel. It’s designed to bite into screw heads and resist loosening in automotive, machinery, and DIY projects where small-head fasteners are used.

✅ 65Mn steel with black finish for durability
✅ Internal teeth dig into screw heads to resist loosening
✅ Eight sizes: M2 9mm, M3 9mm, M4 12mm, M5 12mm, M6 16mm, M8 18mm, M10 20mm, M12 25mm
✅ Includes a sturdy storage box for organization
✅ Higher vibration resistance than standard lock washers

💡 What is an internal tooth lock washer used for in mechanical fastenings?

They’re handy for keeping fasteners tight and reducing vibration in many setups.

- Handy for auto, industrial, and DIY projects - Helps prevent loosening under vibration and cyclic loads - Works with small-head fasteners like fillister and cheese head screws