Countersunk Bolts

Product Specification
Length .010″ to 24″
Diameter .010″ to 3″
Head Type Flat, Socket
Coating Wax, Adhesive, Custom Lubricant
Material Brass, Alloy Steel, Stainless Steel, Aluminum, Carbon Steel
Treatment Case Hardened, Cleaned, Hardened and Ground, Heat Treated

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Product Description

Countersunk bolts are designed to fit flush to the surface of a countersunk hole. When screwed in the face of the head is the only visible part of the screw.  When empty these special holes look like a normal screw hole having a conical opening at the top.

There are two main reasons to use these bolts:

  • To create a smooth finish on an object without bolt heads sticking out.
  • To prevent the exposure of sharp edges.

Norwood Screw Machine Parts has a good reputation in manufacturing countersunk bolts.

Custom Countersunk Bolts Specifications

At Norwood we manufacture countersunk bolts in the following specifications:

Bolt Types (Head types) Flat, Socket
Materials (Metals) Aircraft Aluminum, Brass, Alloy Steel, Stainless Steel, Aluminum, Carbon Steel, Plastics (Nylatron, PTFE, Delrin, and Nylon)
Coating Wax, Adhesive, Custom Lubricant
Finish Zinc Plated, Black Oxide, Brass, PTFE Coating, Cadmium, Polished, Chrome Plated, Phosphate, Galvanized, Hot Dipped, Nickel Plated
Treatment Case Hardened, Cleaned, Hardened and Ground, Heat Treated, Passivated
Diameter .010″ to 3″
Length .010″ to 24″

Countersunk Bolts Applications

They are widely used in following applications:

  • Bridge Decking
  • Walkways
  • Railing

Norwood is a well-known manufacturer of the highest quality countersunk bolts. We excel in manufacturing the types of bolts that best suit your requirements. For any inquiries regarding bolts, please feel free to contact us on our toll-free number 1-800-437-6644 or email us at

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Industries Served

About Norwood Screw Machine

Norwood is a privately owned custom screw machine parts manufacturer. For over 59 years we serve some of the largest corporations to the small company with a new product to develop. Whether a unique item with a one time requirement or a long running contract order with scheduled deliveries, Norwood Screw Machine Parts is the right choice for the job.



Quality Control

We know that we are - and should be - judged by how quickly, accurately and cost-effectively we meet our customer's needs. Our in-house quality assurance team begins the process with the receipt of an order. They maintain close communications with customers to ensure that customer goals are clearly understood and completely achieved.