What Are Socket Screws?
Socket screws are threaded fasteners with a cylindrical head and internal hex drive. They are installed using an Allen wrench or hex key and are valued for their high torque strength, compact head profile and clean appearance. Socket screws are commonly used when external wrenching clearance is limited.
Key Characteristics
The main features of socket screws include:
- An internal hex drive
- Compatibility with Allen or hex keys
- Fully or partially threaded designs
- Ideal for compact or low-clearance installations
- Reduced cam-out risk
Common Types
These are the most common types of socket screws:
- Flat socket cap screws
- Button socket cap screws
- Socket head shoulder screws
- Socket set screws
- Vented socket screws
What Are Low-Head Socket Cap Screws?
A low-head socket cap screw, also known as a low-profile socket cap screw, is a type of fastener used in mechanical applications. It has a hexagonal socket drive and a cylindrical head with a reduced height compared to standard socket cap screws. This reduced head height allows the screw to sit flush or nearly flush with the surface it is fastening, making it ideal for applications where space or clearance is limited.
These screws are often used in situations where a standard socket cap screw would interfere with other components or where a lower profile is desired. Note that due to their reduced head height and smaller socket size, low-head cap screws cannot be preloaded as high as standard socket head cap screws. These fasteners are not suitable for handling dynamic loads.
Other Names
Low-head socket cap screws are also known as:
- Socket low-head cap screws
- Allen head bolts
- Thin Allen key caps
- Low-profile socket screws
Industries and Applications
Allen head bolts made from specialty alloys offer a dependable fastening solution in space-restricted applications across a wide range of industries, including:
Aerospace
In the aerospace industry, low-profile socket screws offer a compact design and high strength in static load assemblies.
Power Generation
Low-head socket cap screws are used to secure equipment subjected to high temperatures and mechanical stress in power generation.
- Applications: Turbine supports, generator housings, control panel assemblies and internal fastening in flue gas scrubbers
- Materials: 317L stainless steel, AL6XN, Hastelloy® C276, 2205 Duplex
Furniture Manufacturing
Low-head socket cap screws are popular in furniture manufacturing for their clean, low-profile finish and secure fastening.
- Applications: Furniture assembly, wood and metal joinery, cabinet hinges, decorative fixtures
Materials: Stainless steel, aluminum alloys
Tips for Purchasing
Follow these best practices to ensure your Thin Allen key caps meet your project specifications:
- Dimension accuracy: Confirm the nominal diameter, thread pitch and screw length using our dimensioning guide.
- Material selection: Select the appropriate material to correspond with environmental and load demands.
- Protective finishes: Inquire about coatings that enhance corrosion resistance and prolong service life.
Request a Quote Today for Reliable Low-Head Socket Cap Screws
Nickel Systems offers a wide range of low-head socket cap screws engineered for dependable performance in space-sensitive applications. Our selection includes numerous high-performance materials that suit the needs of various industries. Whether you need standard sizes or custom fasteners, our team is here to assist you. Contact us today for a quote.
