HKDZ M4 Nuts 100Pcs, A2 Stainless Steel Lock Nuts,Nylon Insert Hex Self-Locking nuts, Rustproof for Industrial Construction Machinery Equipment Repair

• Premium A2 304 Stainless Steel Construction : Made of high-grade A2 304 stainless steel, these nuts offer excellent corrosion resistance, rustproof, and anti-oxidation performance. Suitable for indoor/outdoor use, even in humid, wet, or harsh environments—no more rusted or degraded fasteners.
• Built-in Nylon Insert Self-Locking Design - Equipped with a durable nylon insert that creates a tight friction lock when tightened. Effectively resists vibration loosening, ensuring your assemblies stay secure in high-motion equipment, machinery, or structural components—eliminating the need for Loctite or extra lock washers.
• Integrated Hex Flange for Convenience - Integrated hex flange acts as a built-in washer, providing a larger contact surface to distribute pressure evenly. Prevents surface damage to your workpieces and saves time by eliminating the need for separate washers during installation.
• Standard M4 Thread & Wide Compatibility - Features M4 metric coarse thread (1.0mm pitch, ISO standard) that fits all M4 bolts, screws, and threaded rods. Perfect for industrial construction, machinery repair, equipment maintenance, automotive parts, furniture assembly, and DIY projects.
• Value Pack of 100pcs & Quality Guaranteed - Includes 100 pieces of M4 nylon insert hex flange self-locking nuts, meeting the needs of most small to medium projects. Complies with DIN 985/ISO 7040 standards, with precise thread, smooth installation, and consistent quality—backed by strict quality control.

Crafted from high-quality A2 (304) Stainless Steel, these nuts are built to last. The premium alloy composition offers outstanding resistance to rust, corrosion, and oxidation. Whether used in outdoor construction, wet environments, or chemical-exposed workshops, the surface remains smooth and intact, extending the service life far beyond ordinary carbon steel nuts.