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Customized Indented Hex Washer Head Machine Screws Full Threaded. Comprehensive Certification: ISO, ROHS, SGS certified for quality assurance. Multiple Strength Grades: Available in Grade 4.8, 8.8, 10.9, 12.9, A2-70, A4-70, A4-80. Diverse Finishing Options: Yellow, blue, white zinc plated, Galvanized, HDG, Chromate, Dacromet. Customized Head Styles: Hexagon Washer Head, Indented Hex Washer Head, Hex Washer Head Bolts. OEM/ODM Services: Full customization from samples or designs available. Strict Quality Control: 100% inspection of all products before delivery. Fast Delivery Capability: Stock items delivered in 2 days; production in 15-20 workdays. Flexible Payment Terms: 30% advance T/T, 70% before shipment, PayPal for small orders.