Bolts Metric , Iran

Metric stud bolts are produced from low-carbon steel Grade 4.6 to alloy steel Grade 12.9 per ISO 898-1. Common nominal diameters range from M1.0 to M64 with standard ISO 261 or fine ISO 965 thread pitch. Their tensile strength varies between 400 and 1220 MPa. Standard production lengths range from 6 mm to 3 meters in linear rods. Thread diameter tolerance falls within accuracy classes 6g commercial or 4h precision. The effective thread depth is typically 0.6 to 0.7 times the bolts nominal diameter. The metric thread angle is precisely 60 degrees. Common coatings include electro-galvanizing with a 5-15 micron thickness and yellow passivation. This coating provides corrosion resistance for up to 120 hours in salt spray tests.

The bolt structure is a uniform, fully threaded cylinder without a head. Its ends are typically finished flat or rounded ISO 4753. High-quality grade studs have axial straightness with less than 1 mm deviation per meter. The yield strength of a Grade 8.8 bolt is at least 640 MPa. These bolts exhibit ductility with up to 12% elongation before fracture. The allowable torsional torque for an M10 Grade 10.9 bolt is approximately 50 Nm. The standard operational temperature range is -50 to +150°C. Metric studs are commonly used in industry for cutting, threading, and fabricating custom fasteners. Thread surface quality is specified by the parameter Ra < 6.3 micrometers.You can order and buy Bolts Metric from Iran by contacting us through whatsaap and email.
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