In case you do not know what SPS stands for, it means Standard Press Steel. American Howard T. Hallowell and Harald F. Gade, a Norwegian engineer, began the company in 1903. The year 1906 is when they actually started in earnest. Standard Press Steel got off the ground by making socket set screws. The company moved to a bigger location when the need for other products was great. The items included bolts and also other threaded items.

The early days of SPS Unbrako were a time of trial and error. Skilled craftsmen tried to make the best parts they could with the calipers and scales of the time. It was only during World War I that the firm sought to improve the precision of their manufactured items.

1920 was the year Standard Press Steel moved its operations to Jenkintown. This Philadelphia suburb served as location of the company headquarters and remained such even in the decades ahead. When workers at the plant found they required extra work benches, they started selling other shop equipment like cabinets and shelves, to other companies. After this happened, the SPS Unbrako product line was born. Many companies bought the firm’s now famous socket screws. This made Standard Press Steel rethink its distribution network.

What happened after was, as the saying goes, “history.” One product that’s stood the test of time is the cap screw. A cap screw is a fastener connecting objects and holds them together securely. You use these if you have to fasten machine parts together. Objects that require the use of a cap screw include home appliances and electronic devices. It is important that you pick the right size and type of cap screw for each individual application.

To use a cap screw, you must tighten it directly into a threaded or tapped hole. You typically use it without a nut. A large head on one end and a cylindrical shaft with an external thread makes this up. The external thread is a helical structure that permits the screw to advance whenever you rotate it. It is because the tapped hole has an internal thread, which matches the external screw thread. Whenever you insert the screw and rotate it into the tapped hole, it’ll advance. To tighten or loosen the screw, all that you do is apply some torque to the head with the use of a tool.

Cap screws appear in a number of forms. This lets you use different tools to tighten or loosen a screw. The head has a larger diameter than the threaded part. This is to provide a positive mechanical stop whenever you tighten it. One more reason is it allows the head to accept a specific tool type.

Samples of this are the button head cap screw, the hex head cap screw, and the socket head cap screw. You make use of the button head cap screw for counterbored holes. Its lower profile, dome-shaped head, and recessed hexagonal hole make this possible. The hex head is for use with a spanner wrench, while the socket head features a recessed hexagonal hole perfect for an Allen wrench.

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