XunLiu 30PCS M5X70mm Alloy Steel Grade 12.9 Hex Socket Head Cap Screws, Black Oxide, for Precision Electronics, 3D Printer & Micro Mechanical Fastening

Bullet Points: 1. Exceptional Grade 12.9 Strength: Engineered from 40Cr alloy steel with a tensile strength of 1220 N/mm², these screws provide professional-grade, high-strength fastening significantly superior to standard hardware, ideal for critical and high-stress applications. 2. Precision Micro-Scale Dimensions: Featuring M5X70mm (thread diameter x length) ultra-fine size with a 1.1mm internal hex drive, they are perfectly suited for compact electronics assembly, 3D printing modifications, drone maintenance, and micro-mechanical projects. 3. Durable Black Oxide Coating: The surface treatment provides reliable anti-corrosion protection and a sleek, non-reflective black finish, making these screws suitable for both functional fastening and aesthetically sensitive visible applications. 4. DIN912 Standard Compliance: Manufactured to comply with the international DIN912 specification, ensuring consistent thread forming, precise socket depth, and reliable engagement that prevents stripping for a secure fit every time. 5. Verified Value Pack: Each package contains 50 pieces (±5% tolerance) of these high-precision screws, offering ample quantity for professional repair jobs, prototyping, or production assemblies, delivering outstanding cost-effectiveness for premium-grade fasteners. Professional-Grade Micro Fasteners for Demanding Applications Meet the XunLiu M5X70mm Grade 12.9 Alloy Steel Socket Head Cap Screws – the ultimate solution for precision applications where exceptional strength in a minuscule form factor is non-negotiable. Designed for engineers, technicians, and serious hobbyists, these screws bridge the gap between miniature size and maximum holding power. Engineered for Peak Performance: Unmatched Material Strength: Forged from 40Cr alloy steel and heat-treated to a Grade 12.9 rating (1220 N/mm² tensile strength), they withstand stresses far beyond ordinary screws. Guaranteed Precision Fit: Each screw is manufactured to maintain dimensional accuracy within ±0.24mm tolerance. The consistent thread and perfectly machined hex socket ensure reliable driver engagement without cam-out or stripping. Rust-Resistant & Aesthetic Finish: The black oxide coating not only adds a layer of corrosion resistance for durability in various environments but also provides a clean, professional appearance. Customer-Verified Applications: These screws are the trusted choice for precision tasks: assembling or repairing 3D printer hotends, fixing PC water-cooling radiators, maintaining tiny whoop drones, mounting sensitive circuit boards, and constructing robust small-scale mechanical assemblies. Package Includes: 30 x M5X70mm Grade 12.9 Alloy Steel Hex Socket Head Cap Screws (Black Oxide)

• PREMIUM GRADE 12.9 ALLOY STEEL - High-strength 40Cr alloy steel construction with 1220 N/mm² tensile strength, HRC 39-44 hardness rating ensures exceptional durability and resistance to stripping under mechanical stress
• PRECISION DIN912 COMPLIANCE - Metric M5X70mm length with ±0.24mm tolerance, 3D printing components, and micro-mechanical applications
• ANTI-RUST BLACK OXIDE FINISH - Professional black oxide coating offers superior corrosion protection and clean aesthetic appearance, ideal for visible electronics mounting, robotics projects, and precision instrument assembly
• VERSATILE MICRO-FASTENER APPLICATIONS - Perfect for Rapido hotends, Corsair radiator repairs, tiny whoop drone propellers, PCB mounting, small motor assembly, watch repair, eyeglass hinges, and delicate electronic components
• VALUE PACK WITH QUALITY ASSURANCE - 30-piece quantity (±5% tolerance) in convenient packaging, well-made construction with consistent thread forming prevents easy stripping, backed by verified customer satisfaction for professional and hobbyist use