Collar Bolts

Collar bolts, also known as shoulder bolts or stripper bolts, are a specialized type of fastener that features a shoulder (or collar) between the head and the threaded portion of the bolt. This design offers specific advantages for various applications. Here’s an overview of their key features and specifications:

  1. Shoulder Design: The shoulder provides a defined stopping point, allowing for precise alignment and spacing in assemblies.
  2. Load Distribution: The larger shoulder diameter helps distribute load more evenly, reducing stress on the materials being joined.
  3. Versatile Applications: Commonly used in machinery, fixtures, and applications requiring a pivot point or rotation, such as in linkages or hinges.
  4. Ease of Assembly: Collar bolts can simplify assembly processes, as the shoulder helps to maintain the proper spacing between components.
  5. Material Options: Typically available in various materials, including steel, stainless steel, and plastic, depending on the application needs.
  1. Diameter: Available in a range of diameters for both the shoulder and the threaded portion.
  2. Length: Offered in various lengths, with the length measured from the bottom of the head to the end of the threaded portion.
  3. Thread Types: Can be coarse or fine, allowing for compatibility with different materials and applications.
  4. Shoulder Height: The height of the shoulder can vary, impacting the overall design and application suitability.
  5. Finish Options: Often available in different finishes (e.g., zinc plating, black oxide) to enhance corrosion resistance.