
Premium Custom M27 Black Oxidized Hex Head Bolts and Nuts. Customization from Designs: Produce special customized products according to customer drawings. Customization from Samples: Accept customization based on provided samples. Free Standard Samples: Free samples available for standard products; customer pays express fee. Professional Engineering Support: Engineers provide assistance and create drawings if necessary. Strict Quality Inspection: 100% visual inspection before shipment; defective items replaced. 30 Years Experience: Trading company with over 30 years of fastener industry experience. Diverse Payment Options: Supports LC, T/T, PayPal, D/P, Western Union, and small-amount payments. Fast Lead Time: Peak and off-peak season lead times are both within 15 workdays.