Round Head Square Neck Carriage Bolt

Round Head Square Neck Carriage Bolt. Wide Material Options: Available in Carbon Steel, Alloy Steel, and Stainless Steel A2/A4. Diverse Coating Choices: Offers ZP, Black, HDG, Dacromet, Geomet, and other protective coatings. Extensive Size Range: Diameters from M5 to M30 and lengths from 8mm to 500mm available. High Production Capacity: Monthly output capacity reaches approximately 600 tons. Standard Compliance: Products meet DIN and ANSI standards with Grade 4.8 certification. Strict Quality Control: QC team ensures all products pass Go/No Go Gauge inspections. Fast Stock Delivery: Stock items can be delivered within 2 days after payment receipt. Free Sample Availability: Samples provided free of charge; customer only pays courier fees.