Customized Stainless Steel Black Thumb Knob Screws Bolt with Low Price. Customized Material Options: Available in Carbon Steel, High Strength Steel, and Stainless Steel based on requirements. Extensive Surface Treatments: Offers Zinc-Plated, Nickel-plated, Anodize, Black Oxide, Hot Deep Galvanize, and more. Wide Size Range: Sizes available from M0.8 to M22 to meet specific customer needs. Multiple Material Grades: Includes A2-70, A2-80, A4-80, SUS304, SUS316, GR2, GR5, Brass, and Aluminium. OEM and ODM Services: Factory direct service with full customization for size and specifications. Strict Quality Control: 100% whole range inspection through production with ISO standard compliance. International Certifications: Certified under ISO9001:2008, ISO14001:2004, SGS, and ROHS. Flexible Payment Terms: Accepts TT with 30% deposit and 70% balance before shipment.