ASTM F436 Black Carbon Steel /HDG Flat Washer

ASTM F436 Black Carbon Steel /HDG Flat Washer. ASTM F436 Compliance: Meets chemical and mechanical requirements for hardened washers from 1/4 to 4 inches. Customizable Surface: Surface options include Black, Zinc, HDG, Heat treatment, Dacromet, and GEOMET. Professional Manufacturer: All fasteners designed and manufactured according to specific buyer requirements. Quality Guarantee: Includes durability testing, critical technical design, and MTC/mill certificates. Competitive Pricing: Cost-effective solutions with professional factory supply and reasonable prices. 10 Years Experience: Wide range of parts selection to solve fastening problems effectively. Flexible Customization: Customized services available based on customer samples and drawings. Versatile Applications: Suitable for A325, A490 structural bolts and various other bolt standards.