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Custom Fasteners

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Custom / Special Fasteners

Custom / Special Fasteners

Custom designs are standard at Holbrook. Whatever your application may require, Holbrook can produce quickly and competitively. We can meet your application needs with any combination of heads, threads and drive specifications. We manufacture in both ferrous and non-ferrous materials. Engineering support is available to assist in your fastener selection and testing.

Custom Shoulder Bolts

Custom Shoulder Bolts

Shoulder bolts are utilized for many specialized purposes, they are often used in automotive or mechanical applications. The threads stop a distance from the head, leaving a smooth-sided round shaft between the threads and the head. This shaft diameter is usually larger than the threaded portion of the screw allowing it to act as a stop or pivot point.

Size Range: #2 thru 9/16" Diameter, up to 5" in length

Custom Collar Studs

Custom Collar Studs

Collar studs or Double Ended studs are generally manufactured for a specific application. They give the ability to use one fastener versus two and typically provide a stronger clamp load. Double ended studs can be driven by various methods giving more freedom to a particular design.

Size Range: #2 thru 9/16" Diameter, up to 5" in length

Custom Sems Screws

Custom Sems Screws

Sems are assemblies of a screw with a washer captivated underneath the head. This design reduces two part numbers to one and also saves assembly time on the production floor. The assembly allows you to increase bearing surface over a traditional cold headed part.

Size Range: #2 thru 9/16" Diameter, up to 5" in length

Custom Tapping Screws

Custom Tapping Screws

Tapping Screws are threaded fasteners that have the ability to tap their own mating thread when driven into preformed holes. There are many thread configurations available with this general purpose in mind. Testing the performance characteristics in the specific application will allow the user to determine the best thread design for their use. Engineering support is available to assist in your selection and testing.

Size Range: #2 thru 9/16" Diameter, up to 5" in length

Custom Machine Screws

Custom Machine Screws

Machine Screws are intended to be used with an internally threaded mating part. They can be produced with any drive and head style, including special configurations. Special points can also be added to avoid cross-threading and assist in initial threading. Various material and coatings are available to match the performance and aesthetic requirements of your application.

Size Range: #2 thru 9/16" Diameter, up to 5" in length