Set Screws
What Are Socket Set Screws?
Socket set screws are an integral part for many in the aerospace industry, but what exactly are their features and how do they work? Well, these are typically screws with a head that can be threaded. There is a blind set screw, which is almost always driven with an internal-wrenching drive. These drives include a hex socket (Allen), star (Torx), square socket (Robertson), or slot. The set screws pass through a threaded hole in the outer object and are tightened against the inner object to prevent it from moving relative to the outer object. Essentially, these screws are used to make something a little more secure.
One example of how a set screw is applied is when it is screwed into a pulley hub and its end-point bears firmly against the shaft. The fastening action is by friction between the screw and the shaft, often with some amount of elastic or plastic deformation of one or both. This is also a great example of the durability of this type of screw. And on top of all that, customization is key and makes these set screws special for a given task. Simply provide us with your specifications and we can do the rest!
7 Common Signs of Corrosion in Setscrews
Here are the 7 most common signs of corrosion appearing in setscrews.
- Surface Discoloration: Changes in color on the surface of the setscrew, which includes rust (reddish-brown), white powdery deposits, or dark spots indicate corrosion.
- Visible Rust: Obvious rust formation is a clear sign of corrosion. Check the head and threads for any reddish-brown patches.
- Texture Changes: If a setscrew is corroded it may feel rough, pitted, or uneven. One way to check is to run your fingers along the surface to check for any irregularities and texture changes.
- Loosening or Stiffening of Setscrew: Corrosion can impact the threads of a setscrew. If they become difficult to turn or begin loosening unexpectedly, then there is a chance it is corroded.
- Reduced Strength: Corroded setscrews lose their load-bearing capacity. If you notice weakened or brittle setscrews, then there be some corrosion.
- Breakage or Fractures: Severe corrosion weakens the material, which leads to breakage or fractures. Inspect setscrews for cracks or splits.
- Stuck or Fused Setscrews: Corrosion can cause setscrews to fuse with the mating surface. If you cannot remove a setscrew easily, then it might be corroded.
Regular inspection and preventive measures are essential to maintain the integrity of setscrews and prevent corrosion. But checking for these common signs of corrosion can go a long way to ensure they are working properly.
Considerations for Preventing Corrosion with Setscrews
- Passivation for Corrosion-Resisting Steel: For corrosion-resisting steel setscrews, it is important they are passivated in accordance with regulations. Passivation forms a protective layer on the surface, which enhances resistance to corrosion.
- Black Oxide Treatment for Brass Setscrews: If you are using brass setscrews, it is important to treat them with a black chemical following regulations. This type of treatment helps protect against corrosion.
- Avoid Decarburization: Take care to prevent decarburization, which can weaken the material. Decarburization occurs when the surface loses carbon during heat treatment.
Proper material selection, surface treatments, and environmental considerations play a crucial role in preventing corrosion. Always consult all guidelines and specifications for specific recommendations regarding the prevention of corrosion.
Get Quote for Commercial Set Screws
Sesco Industries is a trusted commercial parts manufacturer. We are a nationwide distributor for all that we offer. We have a great selection of set screws that are available for customization. Please send any inquiries to info@sescoindustries.com. We can provide you with a free quote for any of the aerospace parts that you are interested in purchasing. You can also check out our aerospace parts division at Famsales for more set screws and other parts that are used within the aerospace industry. Request a quote today.
Request a Quote!
Sesco Industries has years of experience as a commercial parts and custom screw manufacturer. We offer our clients a whole host of set screws available for purchase. Customization is possible for many of the commercial set screws we manufacture. For more information about all the commercial parts in our inventory, please contact us today. We will happily answer any and all questions you may have regarding our product selection. When you reach out, we can provide you with a free estimate. Despite being located on the east coast, we ship to clients nationwide! So no matter where your business is located, we have the means to properly supply you.