Cap Screws
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Alloy Steel Socket Head Screws
Alloy steel socket head screws are fasteners made from alloy steel, a type of steel that includes various elements (such as chromium, molybdenum, or nickel) to enhance certain properties like strength, hardness, and corrosion resistance.
Mil. Spec. Alloy Steel Socket Head Screws
These specifications ensure that the screws can withstand extreme conditions and perform reliably in critical applications.
Torx Alloy Steel Socket Head Screws
These screws are used in applications where high torque transmission and reduced risk of cam-out (slippage) are essential.
Left-Hand Threaded Alloy Steel Socket Head Screws
The left-hand threading is specifically designed to tighten counterclockwise, making these screws suitable for applications where the typical rotational forces would loosen a right-hand threaded screw.
High-Temperature Alloy Steel Socket Head Screws—Grade B7
Grade B7 alloy steel is a chromium-molybdenum steel that is known for its high tensile strength and excellent resistance to both heat and wear.
18-8 Stainless Steel Socket Head Screws
The term "18-8" refers to the composition of the stainless steel, which contains approximately 18% chromium and 8% nickel.
Mil. Spec. 18-8 Stainless Steel Socket Head Screws
These screws are designed to meet specific military standards, which define their material properties, dimensions, performance, and quality control measures.
Cleaned and Bagged 18-8 Stainless Steel Socket Head Screws for High Vacuum
These screws are used in critical applications such as vacuum chambers, semiconductor manufacturing, and space technology, where maintaining a clean, contaminant-free environment is essential.
Left-Hand Threaded 18-8 Stainless Steel Socket Head Screws
This stainless steel contains approximately 18% chromium and 8% nickel, providing good corrosion resistance and strength.
Super-Corrosion-Resistant 316 Stainless Steel Socket Head Screws
316 Stainless Steel contains about 16-18% chromium, 10-14% nickel, and 2-3% molybdenum, which gives it enhanced resistance to pitting and crevice corrosion compared to 304 (18-8) stainless steel, especially in chloride-rich environments.
High-Strength A286 Stainless Steel Socket Head Screws
The A286 alloy (UNS S66286) is a precipitation-hardenable, iron-based superalloy that combines the corrosion resistance of stainless steel with the high-temperature strength and creep resistance of nickel-based alloys.
High-Strength 316 Stainless Steel Socket Head Screws
316 stainless steel has a higher content of molybdenum compared to 304 stainless steel, which gives it enhanced resistance to pitting and crevice corrosion, especially in chloride-rich environments such as marine applications.
Plastic Socket Head Screws
These screws provide many advantages over metal screws in specific environments, especially where resistance to moisture, chemicals, or electrical insulation is needed.
Brass Socket Head Screws
Brass is an alloy of copper and zinc, known for its corrosion resistance, particularly in environments with water or humidity, making it ideal for plumbing and marine applications.
Aluminum Socket Head Screws
Aluminum socket head screws are typically made from strong, durable aluminum alloys such as 6061 or 7075, which are known for their excellent balance of strength and corrosion resistance.
Titanium Socket Head Screws
Titanium offers a unique combination of high strength, lightweight properties, and corrosion resistance, making these screws ideal for industries like aerospace, medical, marine, and automotive, where performance and durability in extreme environments are required.
Nickel Alloy Socket Head Screws
A family of nickel-chromium-based superalloys, Inconel (such as Inconel 600, 625, or 718) is known for its excellent oxidation and corrosion resistance at high temperatures.
Bronze Socket Head Screws
The high copper content provides excellent corrosion resistance, while the tin adds strength and durability.
Alloy Steel Low-Profile Socket Head Screws
Despite the low-profile head, they retain the mechanical advantages of standard socket head screws, including the ability to handle high torque.
18-8 Stainless Steel Low-Profile Socket Head Screws
18-8 stainless steel offers excellent resistance to rust, corrosion, and staining, making these screws ideal for outdoor applications or environments exposed to moisture, chemicals, or corrosive elements.
Super-Corrosion-Resistant 316 Stainless Steel Low-Profile Socket Head Screws
This grade of stainless steel contains approximately 16-18% chromium, 10-14% nickel, and 2-3% molybdenum, which provides exceptional corrosion resistance, particularly in chloride and marine environments.
Alloy Steel Ultra-Low-Profile Socket Head Screws
The ultra-low-profile head is thinner than both standard and low-profile socket head screws, providing a minimal protrusion from the surface.
316 Stainless Steel Ultra-Low-Profile Socket Head Screws
316 stainless steel offers superior corrosion resistance, particularly in marine environments, salty air, industrial atmospheres, and areas exposed to chemicals.
High-Profile Socket Head Screws
The extended head height offers more surface area for tool engagement, making it easier to apply higher torque during installation.
Flanged Socket Head Screws
Flanged socket head screws are commonly made from carbon steel or alloy steel for strength and durability in high-stress applications.
Exact-Grip-Length Flanged Socket Head Screws
The exact-grip-length feature ensures that the unthreaded portion of the screw precisely matches the thickness of the material being fastened, preventing threads from contacting the material.
Serrated-Flange Socket Head Screws
The key feature of these screws is the serrated flange, which acts like a built-in washer but with the added advantage of gripping the material.
18-8 Stainless Steel Thread-Locking Socket Head Screws
These screws come with a pre-applied thread-locking compound (such as nylon patch or Loctite) that bonds to the threads upon installation, helping to resist loosening caused by vibration or dynamic forces.
Super-Corrosion-Resistant 316 Stainless Steel Thread-Locking Socket Head Screws
These screws are made from 316 stainless steel, an austenitic stainless steel alloy containing molybdenum, which provides exceptional resistance to corrosion, especially in chloride-rich environments like seawater.
Alloy Steel Thread-Locking Socket Head Screws
Alloy steel is often used in applications requiring the ability to withstand significant mechanical stress. Alloy steel screws are typically heat-treated to improve their hardness and load-bearing capacity.
Stainless Steel Wire-Lockable Socket Head Screws
The defining feature of these screws is one or more small holes drilled through the socket head, allowing safety wire to be threaded through the screw heads of adjacent fasteners. This creates a locking mechanism that physically prevents the screws from loosening or backing out due to vibration or dynamic forces.
Alloy Steel Wire-Lockable Socket Head Screws
Alloy steel is typically heat-treated to increase hardness and strength, making it suitable for high-load environments.The safety wire physically locks the screws in place, preventing them from loosening due to vibration or movement.
Stainless Steel Socket Head Screws with Split Lock Washer
The split lock washer is designed to create friction when compressed during tightening, preventing the screw from loosening due to vibrations or dynamic forces.
Alloy Steel Socket Head Screws with Split Lock Washer
The socket head screws are made from alloy steel, which is a strong and durable material. It typically includes elements such as chromium, molybdenum, or nickel to enhance its strength, hardness, and wear resistance.
Vented Socket Head Screws
This venting allows gases, fluids, or air to escape during fastening, which helps prevent pressure buildup in vacuum, high-pressure, or cleanroom environments.
High-Vacuum Cleaned-and-Bagged Vented Socket Head Screws
These screws are vented, allowing gases, fluids, or air to escape through a hollow center during tightening, and are packaged in clean, controlled environments to prevent recontamination.
Sealing Socket Head Screws
Sealing socket head is typically an O-ring made of elastomeric material such as silicone, Viton, EPDM, or fluorocarbon rubber. This O-ring is positioned under the head of the screw, and it compresses against the surface of the material being fastened when the screw is tightened.
Socket Head Screws with Flat Washer
The flat washer distributes the load of the screw across a larger surface area, reducing the pressure on the material being fastened. This prevents the material from deforming, cracking, or getting damaged under the clamping force.
Vibration-Resistant Sealing Socket Head Screws
These screws combine the benefits of a sealing element, such as an O-ring or gasket, with features that enhance their resistance to loosening due to vibrations or dynamic forces. They are used in applications where both sealing and vibration resistance are critical, such as in automotive, aerospace, marine, and heavy machinery environments.
Nylon-Tip Alloy Steel Socket Head Screws
The nylon tip prevents the hard steel of the screw from directly contacting the material being fastened, reducing the risk of scratching, denting, or otherwise damaging delicate surfaces.
Brass-Tip Alloy Steel Socket Head Screws
The brass tip ensures that the screw can make secure contact with the material being fastened without causing damage, making it ideal for soft or delicate surfaces such as polished metals, plastics, or finished woods.
Socket Head Screws for Square-Drive Wrenches
The square recess in the screw head provides four points of contact with the square-drive wrench or bit, allowing for better torque application and reducing the risk of cam-out (slipping of the tool out of the screw).
