100Pcs M3–M16 Galvanized Internal Serrated Lock Washers
100Pcs M3–M16 Galvanized Internal Serrated Lock Washers
100-Piece Galvanized Carbon Steel Internal Serrated Lock Washer Set
Keep every bolt, screw, and nut locked firmly in place with this versatile 100-piece set of internal toothed serrated lock washers. Available in sizes M3 through M16, these galvanized carbon steel washers are engineered for both professional mechanical assemblies and everyday home DIY projects. Made in Mainland China.
Key Features
- Reliable Anti-Loosening Performance: Precision-machined sharp serrated inner teeth bite firmly into fastener heads and mounting surfaces, preventing rotation caused by vibration or torque fluctuation — keeping your connections secure for the long haul.
- Excellent Load-Bearing Capacity: High-hardness, high-toughness carbon steel withstands heavy torque and pressure without deforming, delivering stable, industrial-grade performance even under demanding mechanical stress.
- Long-Lasting Corrosion Resistance: A dense galvanized surface coating shields the carbon steel base from rust, moisture, and mild corrosive exposure — extending service life for both indoor and outdoor applications.
- Effortless Installation: Standardized precision dimensions fit standard fasteners without adjustment. Serrated edges self-align during tightening, speeding up assembly whether you're on a job site or working on a weekend project.
Specifications
| Material | Galvanized Carbon Steel |
| Finish / Color | Silver (Galvanized Surface) |
| Sizes Included | M3, M4, M5, M6, M8, M10, M12, M14, M16 |
| Thickness | 1 mm |
| Quantity | 100 Pieces |
| Country of Origin | Made in Mainland China |
Applications
- Industrial machinery assembly
- Automotive repair and maintenance
- Electronic equipment installation
- Furniture and cabinetry assembly
- Home DIY improvement projects and woodworking
You May Also Like
- 3-Jaw Keyless Ratchet Drill Chuck 0.8–10mm Self-Locking
- Rotary Hidden Furniture Hinge Folding Door Hardware 1 Pair
- PU Leather Welding Sleeves – Heat Resistant Arm Guards 1 Pair
Note: Photos are for illustrative purposes only and may not reflect actual size or exact color. Please refer to the specifications table for dimensions. Minor measurement differences may occur due to manual measurement processes.
Learn more: OSHA on eye and face protection
Frequently Asked Questions
Q: What sizes are included in this 100-piece serrated lock washer set?
A: The set includes internal toothed lock washers in sizes M3, M4, M5, M6, M8, M10, M12, M14, and M16, covering a wide range of standard fastener sizes for both light-duty and heavy-duty applications.
Q: What is the difference between internal and external serrated lock washers?
A: Internal serrated lock washers (like these) have teeth on the inner edge that grip the fastener shaft directly, making them ideal for use under bolt heads or nuts where a cleaner outer appearance is desired. External serrated washers have teeth on the outer edge for a wider grip footprint.
Q: Are these galvanized lock washers suitable for outdoor use?
A: Yes. The galvanized surface treatment forms a protective zinc layer over the carbon steel base, providing solid resistance to rust, moisture, and mild corrosion — making these washers well-suited for both indoor assemblies and outdoor applications.
Q: How many washers of each size are included?
A: The 100-piece set is distributed across the nine available sizes (M3–M16). Please refer to the product images for the exact per-size breakdown, as quantities per size may vary.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.