bolt m.r , Iran

The cylindrical screw features a perfectly uniform body diameter with a fully threaded or partial thread shank design. The head geometry is precisely machined as either hexagon or hex socket (Allen) type with tight tolerances. Nominal diameter sizes range from M1.6 up to M64 millimeters according to standardized thread profiles. Thread pitch options include coarse (standard) and fine series for specific vibration-resistant applications. The thread angle measures exactly 60 degrees with sharp crest and root radius for optimal load distribution. Pitch diameter tolerance classes include 6g for external threads and 6H for internal threads. The head height to diameter ratio follows a fixed proportion of 0.7 to 0.8 for hexagon heads. Socket head versions have a cylindrical head with 0.5 to 1.5 millimeters chamfer on top edge.

Cylindrical screws are manufactured in property classes 4.6, 5.6, 8.8, 10.9, and 12.9 for steel versions. Class 8.8 screws have minimum tensile strength of 800 Newtons per square millimeter with 640 yield strength. Class 10.9 screws achieve 1040 tensile strength for high-stress bolted connections. Class 12.9 represents the highest strength grade with 1220 Newtons per square millimeter tensile capacity. Stainless steel grades A2 (304) and A4 (316) provide corrosion resistance for outdoor and marine environments. Brass and aluminum versions are available for electrical conductivity and lightweight applications. Proof load values range from 225 Megapascals for class 4.6 up to 970 Megapascals for class 12.9. Common applications include machinery assembly, structural steel connections, engine components, and precision equipment manufacturing.You can order and buy bolt m.r from Iran by contacting us through whatsaap and email.
WEBSITE: bolt m.r Iran