
Nq Bq Hq Pq Drill Rod for Core Drilling China Suppliers. High Manganese Steel Material: Manufactured from high tensile cold drawn and hot finished seamless steel tubes for superior durability. Heat Treatment Process: Drill rod adaptors and thread ends undergo heat treatment, hardening, and tempering for extended service life. Wide Range of Specifications: Available in AQ, BQ, NQ, HQ, PQ, S75, and various DCDMA sizes with precise outer and inner diameters. Coal Mining Application: Specifically designed and optimized for high-quality performance in coal mining operations. Comprehensive Product Line: Supplier offers drill rods, core bits, casing, reaming shells, and full drilling accessories. Fast Lead Time: Average lead time within 15 workdays for both peak and off-peak seasons. Flexible Payment Terms: Accepts LC and T/T payment methods to accommodate international trade requirements.