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Step Screw Stud Bolts Special Bolts Step Bolts (GM016). High Strength Grades: Available in 8.8, 10.9, and 12.9 grades for superior durability. Customized Sizes: Size range from M3 to M48 available upon request. Customized Finishes: RoHS zinc plating with hydrogen embrittlement removal available. Customized Head Types: Options include Hex with Torx or Socket Drive. Long Length Capability: Manufacture length up to 300mm supported. High Corrosion Resistance: Salt spray test up to 2000 hours for zinc plated products. OEM/ODM Services: Full OEM and ODM services available for industrial clients. Wide Material Selection: Materials include C1022, C10B21, and stainless steel grades 302/304/316.