
Double Self-Locking Nuts for Aviation 30crmnsia Steel 1Cr17Ni2 GB930. Custom-Made Acceptance: Accepts custom drawings and specifications for unique fastener requirements. Diverse Material Options: Available in Steel 30CrMnSiA, 1Cr17Ni2, Brass, and Aluminium. Multiple Surface Treatments: Offers Hot Galvanized, Black, Color-Zinc, and Blue-White Zinc finishes. ISO 9001 Certified: Passed ISO9001:2015, CQM, and IQNet Quality Management System Certifications. Free Samples Available: Free samples provided for standard fasteners; customer pays freight for custom ones. Fast Response Time: All customer inquiries and questions are replied to within 12 hours. Flexible Payment Terms: Supports T/T, Paypal, L/C, Western Union, and small-amount payments. Global Shipping Options: Provides Sea Freight, Air Freight, and Express Delivery worldwide.