Grade 10.9 high-strength industrial screws, featuring black oxide finish and dual thread standards (3/16-24 BSW, 1/4-20, 1/2-13 UNC), adopt a countersunk head and hex socket drive. Crafted from heat-treated alloy steel, they deliver exceptional tensile strength and wear resistance, ideal for heavy-duty applications. The black oxide coating enhances rust resistance and durability, while BSW (British Standard Whitworth) and UNC (Unified National Coarse) threads ensure compatibility with UK and US industrial components. Perfect for machinery, automotive parts, construction hardware, and cross-standard industrial assemblies requiring reliable high-load fastening.
Core Features & Advantages
Grade 10.9 High Tensile Strength: Heat-treated alloy steel construction offers superior tensile strength (≥1000MPa) and shear resistance, outperforming standard grades in heavy-load, high-stress industrial scenarios, ensuring long-term structural stability.
Black Oxide Corrosion Protection: Black oxide finish provides enhanced rust resistance and wear resistance, extending service life in indoor/outdoor industrial environments, while maintaining a sleek, industrial aesthetic.
Dual BSW/UNC Thread Standards: Covers 3/16-24 BSW (British 惠氏螺纹) and 1/4-20, 1/2-13 UNC (美制粗牙螺纹), compatible with UK and US-standard components, widening application scope across global industrial markets.
Countersunk Hex Socket Design: Countersunk head enables flush mounting for a clean finish, avoiding surface protrusions; hex socket drive ensures precise tightening in confined spaces, reducing slippage and drive damage.
Multi-Size Versatility: Three key sizes cater to diverse heavy-duty fastening needs, from medium to large industrial components, fitting machinery, automotive, and construction assembly requirements.
