It is designed for superior holding power in concrete

Typical hardness on diameters of 1/4 to 1 inch is HRC 25-34

10 x 4 Phillips Bugle Coarse Drywall Screws Phosphate Coated - Carton (800)

8 x 1 5/8 Simpson Fiber-Cement Screws T17 316 SS - Carton (1000)

3/8-16 x 1 3/4 Grade 5 Plow Bolt No. 3 Head Fully Threaded Plain - Package (100) M20-2.50 Hex Cap Screws DIN 933 18-8 Stainless Steel (A2) It is designed for superior"Upgrade your fastening system with this set of 100 3 8 16 x 1 3 4 Grade 5 Plow Bolts. Made with a No. 3 Head and fully threaded for maximum stability, these bolts are perfect for heavy duty machinery and construction. Trust in the quality of these plain bolts to secure your projects with ease."