Square Neck Bolts
Square Neck bolts
Square or domed top with
square under head.
SQUARE NECK BOLTS are also known as square neck carriage bolts. Square neck bolts are mostly used in wood. They are common to have a square or doomed top and a square under the head.

The square neck bolt square pulls into the wood as the nut in tightened for a very secure fit. Available in a variety of diameters, square neck bolts are another common choice for any job.

Square neck bolts are made from a variety of types and grades of steel to suffice for the abundance of applications square neck bolts are used. Below are just a few of the common bolt types.
  • Zinc-plated bolts: Moderate protection against rust.
  • Steel grade 5 bolts: Medium carbon steel; used in high-strength automotive applications.
  • Stainless steel 18-8 bolts: This material of choice for exterior and marine applications is produced from an alloy of steel with a high corrosion resistance.
  • Silicone bronze bolts: Used in wood boat building this alloy of copper has better strength and corrosion resistance than brass.
  • Hot dipped galvanized bolts: Much more corrosion resistant than zinc-plated. These thick coated bolts work with galvanized buts for exterior use in the costal areas.
Other bolt types available at BOLT PRODUCTS INC:

• Anchor bolts - extended connections with handle
• Carriage bolts - domed top with square under head
• Flange bolts - ridge around the bolt head
• Hex bolts - hex head of various materials
• Hex tap bolts - trimmed hex head with no flange
• Lag bolts - screw like pointed end
• Machine bolts - fine or coarse threads
• Metric bolts - available in Hex/Standard/Flange type
• Shoulder bolts - allow slide or pivot

No matter what bolt type you require please do not hesitate to contact us at 1-800-423-6503 or email sales@boltproducts.com.