Round Head Bolt
Round head bolts are commonly used in wood connections.Round head bolts include the following types: Round Head Bolt (Button Head Bolt). The round head bolt shall have a circular head with a low rounded top surface and a flat bearing surface.
Round Head Square Neck Bolt (Round Head Carriage Bolt) The round head square neck bolt shall have a circulare head with a low rounded top surface and a flat bearing surface, and an integrally formed square neck under the head.
Round Head Fin Neck Bolt (Fin Neck Carriage Bolt) shall have a circulare head with a low rounded top surface and a flat bearing surface, and two diametrically opposite integrally formed fins at the junction of head with shank.
Step Bolt shall have a circulare head with a low rounded top surface and a flat bearing surface, and an integrally formed square neck under the head.
Round Head Bolt
Material: Carbon Steel, Alloy Steel, Stainless SteelStandard: ASME/ANSI B 18.5, JIS B1171,DIN603
Measurement system: INCH, Metric
Size: #10 -1”, M5-M20
Grade / Class: Gr.A,5,8; Class. 8.8, 10.9
Thread: M, UNC, UNF
Finish: Black Oxide, Zinc Plated(Clear/Blue/Yellow/Black), H.D.G. Y.Z.P. Plain, Nickel, Chrome
Customized production is welcomed
Round Head Bolt
Round Head Bolts are used to fasten wood to wood, wood to metal and metal to metal. They are a member of the round head bolt family and commonly have a "circular head with a low rounded top surface and flat bearing surface." However, they can be used with an internally threaded (tapped) hole.Threads are standard right-hand and Unified inch coarse series (UNC, Coarse). Lengths of 6" and shorter are usually fully threaded; lengths longer than 6" are partially threaded.
Head diameter is roughly twice the size of the bolt or, for smaller sizes, a little more than double.
Grades 2 and 5, steel, and stainless steel, are the most prevalent types of Round Head Bolt.
Common finishes for Grade 2 are zinc plating and hot dip galvanizing, and zinc plating for Grade 5. Zinc, the most popular and least expensive commercial plating, offers moderate corrosion resistance. Hot dip galvanized is a thick coating of zinc that protects against corrosion in harsh environments. Stainless steel, though, is a better choice when corrosion is of concern. Hot dip galvanized and stainless steel are usually recommended if the bolts (less than 1/2" in diameter) will be used with pressure preservative treated wood such as "ACQ" (Alkaline Copper Quaternary)—check local building codes and contact your lumber supplier for recommendations.
Grades 2 and 5, steel, and stainless steel, are the most prevalent types of Round Head Bolt.
Common finishes for Grade 2 are zinc plating and hot dip galvanizing, and zinc plating for Grade 5. Zinc, the most popular and least expensive commercial plating, offers moderate corrosion resistance. Hot dip galvanized is a thick coating of zinc that protects against corrosion in harsh environments. Stainless steel, though, is a better choice when corrosion is of concern. Hot dip galvanized and stainless steel are usually recommended if the bolts (less than 1/2" in diameter) will be used with pressure preservative treated wood such as "ACQ" (Alkaline Copper Quaternary)—check local building codes and contact your lumber supplier for recommendations.
