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Set screws are small but mighty fasteners crucial for securing components without protruding heads. Their role in machinery, electronics, and various DIY projects means selecting the correct type and size is paramount for ensuring a secure, reliable, and aesthetically pleasing assembly. Understanding the nuances of these essential tools can prevent future issues and guarantee optimal performance.
25 Sizes Metric + SAE: The set screw assortment kit contains the most commonly used sizes in daily repairs, SAE...
Hex Socket Design: The set screw are professionally cut and polished. They not only have a smooth surface and have a certain load-bearing capacity, but also have tight threads to increase torque. and can be used for long time.
12.9 Alloy Steel: Set screws are made of durable 12.9 grade alloy steel and feature black zinc plating technology. They contain no organic oil but will not rust.
Convenient Storage: Each type of set screws are individually packed in a transparent bag marked with the size and placed in a storage box with partitions. There are labels inside and outside the box, and the size and quantity are clear, which can be...
Metric set screws include: M3 * 3/4/5/6mm - M4 * 4/5/6mm - M5 * 5/8mm - M6 * 6/10mm - M8 * 8mm - A total of 60pcs, 12 different sizes.
Grub screws is widely used in home repair, furniture, garage, machinery, electronics, household appliances, Musical Instruments, precision machinery, door handles, faucets, lamps, bathrooms and more, professional electricians, plumbers, builders, DIY...
Set Screws is made of stainless steel, which has excellent anti-rust, anti-oxidation and anti-corrosion properties and is not easy to break, so it can be used for a long time in any environment.
Point set screws has uniform force, not easy to slip, uniform pitch, obvious thread, no residual burr, prevent parts from loosening, the design has good vibration resistance, and good holding effect can be obtained by tightening the thread.
【What You Get】- Our set screw assortment kit contains 12 SAE sets and 13 metric kits, with a total of 25 sizes of 560pcs, 5 metric hex wrenches and 5 British hex wrenches, enough to meet daily needs.
【 25 Various Most Used Sizes】- The set screw kit contains the most commonly used sizes in daily repairs: Metric: M3 M4 M5 M6 M8. SAE...
【Good storage and assortment】- The Set Screw Kit comes with a thickened plastic storage box with all the screws, wrenches sorted and packed in different compartments and neatly organized, with detailed labels on the inner and outer lids for easy...
【Premium Material】- The Screws Set is made of high-quality 12.9grade alloy steel for strength, superior rust resistance, and excellent oxidation resistance for durability. Adopting black zinc plating technology, they have a smooth surface that does...
SUPERIOR QUALITY: EilxMag grub set screws are made of upgrade 12.9 class alloy steel for better corrosion and rust resistance. The set screw kit is made of the finest manufacturing process and non-toxic, non-polluting materials with smooth threads and...
UNIVERSAL SIZE: Total 1130 pcs, 32 different sizes of set screw assortment kit can meet your different needs. Metric: M3 M4 M5 M6 M8. SAE Standard: 1/8-40, 5/32-32, 3/16-24, 1/4-20, 5/16-18, also comes with 5 METRIC hex wrenches and 5 SAE hex wrenches
EASY TO USE: With clean cut edges and fine threads, these set screws for bathroom fixtures and door handles are not prone to loosening, which can be easily screwed in with the hex wrench provided, making them easy and convenient for all to use
WIDE APPLICATION: This small set screw kit suitable for a variety of scenarios, such as faucet repair, door knob installation, lighting installation, pipe fixing, as well as a variety of precision machinery, classified instruments, electronic products...
No Head Design: Socket set screws are headless fasteners, known as grub screws, without protruding above the surface, used in machinery, pulleys, and collars to hold shafts in place. Easy to use with their internal hex drive. Cup point set screw uses a...
Standard Size: Our set screws are professionally cut and polished, have precise and clean threads. Metric size conforms to DIN 916, SAE size conforms to ASME B 18.3
Reliable Material: The set screw is made of durable 12.9 grade alloy steel, offering excellent tensile strength, superior hardness and wear resistance, with black oxide for enhanced corrosion resistance and rust prevention
Metric and SAE Set Screw Assortment Kit: 25 sizes total 700pcs set screws. Metric M3 x 3/4/5/6/8mm, M4 x 4/6/8mm, M5 x 5/8mm, M6 x 6/10mm, M8 x 8mm. SAE 1/8"-40 x (1/8",5/32",1/4",5/16"), 5/32"-32 x (3/16",1/4",5/16"), 3/16"-24 x (3/16",5/16"), 1/4"-20 x...
【Set Screw Assortment Kit】The set screw assortment kit includes 10 of the most commonly used sizes in both Metric and SAE standards. Metric sizes: M3, M4, M5, M6, M8, along with 6 hex wrenches
【Set Screw Material】The set screws in this assortment kit are made from high-quality 304 stainless steel. Complete with allen keys, the kit is extremely durable and corrosion-resistant, ensuring longevity in any environment
【Hex Socket Design】Each set screw is professionally cut and polished. This precision processing not only gives them a smooth surface and decent load-bearing capacity, but also creates tight threads that boost torque, allowing for long-term use
【Widely Used】Hex socket set screws are ideal for installing door handles, fixing pipes, repairing bathroom appliances, and servicing precision machinery, cameras, and electronic equipment. Whether you're a professional electrician, plumber, builder...
【304 Stainless steel】: The set screws assortment kit are made of 304 stainless steel with standard threads and fine workmanship process, which offers better corrosion resistance and rust prevention. It can meet the needs of different occasions
【One Box of Metric + One Box of SAE】: 1500pcs in total, different universal 32 sizes of grub screw kits can meet your different needs. Metric: M3 M4 M5 M6 M8. SAE standards: 1/8-40, 5/32-32, 3/16-24, 1/4-20, 5/16-18, also equipped with 5 metric hex...
【Allen + Cup point】: Cup points have a cup-shaped point to indent into the contact material for permanent or semi-permanent installations on soft or hard surfaces. All set screws are professionally milled or ground to reduce the chance of slippage and...
【Easy to Use】: The set screws for bathroom fixtures and door handles have clean cutting edges and fine threads that are not easy to loosen. They can be easily screwed in with the provided hex wrench, making them very easy and convenient to use
32 Sizes Metric + SAE: The set includes complete metric (M3-M8) and SAE (1/8 "-40-5/16" -18) series stop screws, covering common lengths and thread specifications. One set can meet various needs without the need for separate procurement, bidding farewell...
High hardness alloy material: All screws are made of 12.9 grade alloy steel, with a black galvanized surface, neat cutting, smooth threads, fine workmanship, and can effectively resist vibration loosening and mechanical wear. They have excellent corrosion...
Hexagonal socket design: The fixing screws are professionally cut and polished, with a smooth surface, clear and complete tooth profile, and can be screwed in smoothly without any jamming; The tight threads ensure strong torque resistance.
Widely applicable: widely used in machine tool equipment, automotive parts, electronic instruments, furniture hardware, DIY handicrafts and other fields
SUPERIOR QUALITY: EilxMag grub set screws are made of upgrade 12.9 class alloy steel for better corrosion and rust resistance. The set screw kit is made of the finest manufacturing process and non-toxic, non-polluting materials with smooth threads and...
UNIVERSAL SIZE: Total 2000 pcs, 26 different sizes of set screw assortment kit can meet your different needs. Metric: M3 M4 M5 M6 M8. SAE Standard: 1/8-40, 5/32-32, 3/16-24, 1/4-20, 5/16-18, also comes with 5 METRIC hex wrenches, 5 SAE hex wrenches and...
EASY TO USE: With clean cut edges and fine threads, these set screws for bathroom fixtures and door handles are not prone to loosening, which can be easily screwed in with the hex wrench provided, making them easy and convenient for all to use
WIDE APPLICATION: This small set screw kit suitable for a variety of scenarios, such as faucet repair, door knob installation, lighting installation, pipe fixing, as well as a variety of precision machinery, classified instruments, electronic products...
SUPERIOR QUALITY: EilxMag grub set screws re made of 304 stainless steel for better corrosion and rust resistance, with smooth threads, fine workmanship and durability. The screw kit is made of the finest manufacturing process and non-toxic, non-polluting...
UNIVERSAL SIZE: Total 2000 pcs, 26 different sizes of set screw assortment kit can meet your different needs. Metric: M3 M4 M5 M6 M8. SAE Standard: 1/8-40, 5/32-32, 3/16-24, 1/4-20, 5/16-18, also comes with 5 METRIC hex wrenches, 5 SAE hex wrenches and...
EASY TO USE: With clean cut edges and fine threads, these set screws for bathroom fixtures and door handles are not prone to loosening, which can be easily screwed in with the hex wrench provided, making them easy and convenient for all to use
WIDE APPLICATION: This small set screw kit suitable for a variety of scenarios, such as faucet repair, door knob installation, lighting installation, pipe fixing, as well as a variety of precision machinery, classified instruments, electronic products...
Last update on 2026-10-14 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Set Screws
Understanding Set Screw Types
Set screws, also known as headless screws, primarily differ in their drive type and point style. Common drive types include hex (Allen), slotted, and Torx, each offering different torque application capabilities and tool compatibility. The point style, such as cup, cone, dog, and flat, dictates how the screw interacts with the mating surface. Cup points are the most common, providing a good balance of holding power and surface damage. Cone points offer deeper penetration for softer materials, while dog points are ideal for precise positioning.
Material Matters
The material of a set screw is critical for its strength, corrosion resistance, and compatibility with the surrounding components. Stainless steel offers excellent corrosion resistance, making it suitable for outdoor or wet environments. Steel, often hardened and plated (like zinc or black oxide), provides high strength and durability for demanding applications. Brass set screws are non-magnetic and offer good corrosion resistance, often used in electrical or sensitive applications where sparking is a concern.
Size and Thread Selection
Choosing the correct size involves considering both the diameter and length of the screw, as well as the thread pitch. The diameter should match the tapped hole or the component being secured. Length is important for ensuring sufficient thread engagement for a secure hold. Thread pitch (coarse or fine) influences the screw's holding power and ease of installation; coarse threads are generally easier to install, while fine threads offer finer adjustment and potentially higher holding strength in certain applications.
Application Considerations
Think about the specific environment and load the set screw will encounter. For applications involving vibration, consider using a set screw with a nylon tip or a thread-locking compound to prevent loosening. If the screw will be subjected to significant torque, opt for a hardened steel screw with a robust drive type like hex or Torx. For applications where appearance is important, consider the finish and ensure the screw sits flush or recessed.
Comparison Tips
Match the drive type to available tools and required torque.
Select a point style appropriate for the hardness and precision needs of the mating surface.
Consider the environment for corrosion resistance (e.g., stainless steel for damp areas).
Ensure sufficient thread engagement for the required holding power.
Prioritize material strength for high-stress applications.
Frequently Asked Questions
What is the primary function of a set screw?
The primary function of a set screw is to secure one object within or against another by exerting pressure through its threaded body. They are typically used to prevent relative motion between a shaft and a collar, pulley, or gear.
Are set screws designed to be visible?
No, set screws are designed to be headless, meaning they do not have a protruding head. This allows them to be fully recessed into a tapped hole, making them ideal for applications where a smooth exterior is desired or where space is limited.
What is the difference between a cup point and a cone point set screw?
A cup point set screw has a concave tip that creates a strong holding force by indenting the mating surface. A cone point set screw has a sharp, conical tip that penetrates the mating surface, offering precise positioning and good holding power in softer materials.
When should I use stainless steel set screws?
Stainless steel set screws are recommended for environments prone to corrosion, such as outdoor applications, marine settings, or areas with exposure to moisture or chemicals. They also offer good strength and durability.
How do I determine the correct size set screw?
Correct sizing involves matching the screw's diameter and thread pitch to the tapped hole. The length should also be sufficient to provide adequate thread engagement for the intended holding strength.
Can set screws be reused?
While set screws can often be reused, their effectiveness may diminish with each use, especially if the point has significantly indented the mating surface. It is advisable to inspect the screw and the mating surface for wear before reinstallation.
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