Bolt manufacturer · Tehran, Iran · Since 2006
Cold-forged bolts and pins, built to your drawing.
Since 2006, Samand Pich Arian has made M4 to M12 automotive bolts and pins for carmakers and auto-part manufacturers. Forging, thread rolling, heat treatment, coating and lab testing all happen in our own plant.
IATF 16949
ISO 9001
DIN and ISO standards
Head. Formed from steel wire on our cold-forging headers without heating, so the grain flow follows the shape of the head.
Part
Wheel stud
Process
Cold forging
Finish
Zinc plated
2006
Founded in Tehran Province, 20 years of cold forging
3M
Bolts and pins a month, production capacity
M4–M12
Thread sizes, in every property class
IATF
16949 automotive quality certified, plus ISO 9001
Engineering Tools
Free calculators and reference tables for bolts
Calculator
Weight calculator
Weight per piece and per 1,000 for bolts, studs and pins.
Calculator
Metric thread calculator
Pitch and minor diameters, 6g and 6H limits, tap drill and clearance hole.
Calculator
Breaking load
Minimum breaking load for every size and property class.
Calculator
Cpk calculator
Cp, Cpk and expected PPM from your tolerance and measurements.
Table
Property classes
Strength and hardness of classes 4.6 to 12.9 (ISO 898-1).
Table
Hardness conversion
HV, HB, HRC and approximate tensile strength for steel.
Table
Coatings and salt spray
Salt spray hours for zinc, zinc-nickel and zinc flake.
Open all tools
Seven tools on one page, for engineers and buyers.
Explore S.P.A