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DIN916 Hexagon Socket Set Screws With Cup point

Welcome to Ningbo Teng Qi Fasteners Co., Ltd, your premier manufacturer of DIN 916 hexagon socket set screws with cup points. DIN 916 refers to the German Institute for Standardization (Deutsches Institut für Normung) standard for these set screws, outlining specifications for their design and manufacturing. Our set screws adhere to these rigorous standards, ensuring consistent quality and performance across all our products.

DIN 916 set screws feature a hexagon socket for easy tightening and a cup point design that enhances grip and prevents slippage, making them ideal for securing components in various industrial applications. The designation “DIN 916” signifies that these set screws meet specific criteria regarding dimensions, materials, and performance, providing assurance of reliability and compatibility with industry standards. Trust [Your Company Name] for DIN 916 set screws that not only meet but exceed expectations, offering precision-engineered solutions for your fastening needs.


din916 set screw
din916 set screw with cup point


The DIN 916 set screw with a cup point is a standardized fastening component commonly used in industrial applications. Designed with a hexagonal socket drive and a concave indentation at one end, it provides secure fastening and resistance to tampering. Available in various sizes and materials, it’s ideal for machinery, automotive, and equipment where a flush or hidden screw is necessary for component security.

Product Name:DIN916 Set Screw
DiameterThe diameter of a DIN 916 set screw refers to the measurement across the widest point of the screw’s threaded portion. It is typically specified using the metric system, such as M3, M4, M5, etc. The diameter determines the size of the threaded hole into which the set screw will be inserted and tightened.
LengthThe length of a DIN 916 set screw indicates how far it extends when fully threaded into a mating component or surface. Lengths can vary depending on the specific application and requirements, ranging from a few millimeters to several tens of millimeters. The length specification is crucial for ensuring proper engagement and secure fastening of components.
ClassSteel: 45H
Stainless Steel;A2-70,A4,C3,A2-50
TypeHexagon socket set screw with a cup point
Material High-strength steel (e.g., SCM435)
Alloy steel (e.g., ML40CR)
Medium to low-carbon steel
Stainless steel
Manufacturing Processwire drawing, cold heading, thread rolling, heat treatment, surface treatment
Surface treatmentBlack Oxide Coating/Zinc Plating (Electroplating)/Hot-Dip Galvanizing/Mechanical Galvanizing/Dacromet Coating/Painting or Powder Coating

When specifying set screws, it’s important to consider the requirements of your application to ensure that the chosen set screw is compatible with the materials, forces, and conditions it will encounter.

Dimension Chart of DIN916 Set Screw:

1. Thread Diameter (d): The thread diameter of a DIN 916 set screw refers to the main diameter of its threads, typically measured in millimeters.

2. Thread Pitch (p): Thread pitch indicates the distance between threads on the screw and is measured in millimeters. It is a crucial dimension for DIN 913 set screws.

3. Hex Key Size (Across Flats) (s): The set screw features an internal hexagon socket for tightening with a hex key or wrench. Hex key size (across flats) is the distance between two parallel hexagonal sides of this socket.

4. Hex Key Depth (t): Hex key depth refers to the depth of the internal hexagon socket, representing the maximum depth a hex key can be inserted into the set screw.

5. Set Screw Length (L): This is the measurement from the bottom of the set screw (or from the end of the threads, in the case of headless set screws) to the end of the threads. It determines how deeply the screw can be threaded into a tapped hole or onto a shaft.

6. Diameter of a dog point (dp): refers to the width or thickness of the cylindrical protrusion on the end of a set screw or similar fastener. In the context of fasteners like set screws, the dog point is a specific type of extended tip designed for easy alignment and initial positioning. The diameter of the dog point is a critical measurement, ensuring proper fit and engagement with the mating surface.

7.The height of the dog point (z): The height of the dog point on a DIN 915 set screw refers to the measurement of the cylindrical protrusion extending from the end of the screw. This dimension is crucial as it determines how far the dog point extends beyond the threaded portion. The height is essential for applications where the set screw is used to locate or align components, providing a reference point.

When L≤L0, it is short screw; When L > L0, it is a long screw.

Thread Diameter(d)Thread Pitch(P)Hex Key Size (s) Hex Key Depth (t) min Short type screwHex Key Depth (t) min Long type screwDiameter of a dog point (dp)The height of the dog point (z) Short type screwThe height of the dog point (z) Long type screwL0

Application of  DIN916 Set Screw:

The DIN 916 set screw, distinguished by its cup point design, finds application in various industries where secure and precise fastening is essential. Here are detailed explanations of its applications:

Machinery and Manufacturing:DIN 916 set screws are commonly used in machinery and manufacturing equipment to secure components, preventing unintended movement and ensuring stability. The cup point design allows for a concentrated point of contact, contributing to a secure grip.
Automotive Industry:Applied in automotive manufacturing for specific applications where a cup point set screw can effectively secure parts, contributing to the overall integrity and functionality of automotive components.
Construction:Utilized in construction for fastening and aligning specific components where the cup point design offers a recessed and secure connection, preventing slippage.
Electronics:Found in electronic devices and equipment, DIN 916 set screws secure components within housings, providing stability and preventing movement due to the cup point's focused contact.
Instrumentation:Applied in precision instruments and devices where the cup point ensures a secure grip and precise alignment, enhancing the reliability and performance of instrumentation.
Furniture:Used in furniture assembly, DIN 916 set screws contribute to the structural integrity of furniture by securely fastening various

Manufacturing Quality Control of Set Screw:

As a leading set screw manufacturer, our commitment to excellence is reflected in our rigorous manufacturing quality control processes. We meticulously inspect each set screw, ensuring precise dimensions, accurate threading, optimal material composition, and impeccable surface finish. Our quality control measures extend to torque resistance and hardness testing, guaranteeing that every product meets or exceeds industry standards. With a relentless dedication to quality assurance, we take pride in delivering reliable and top-notch set screws to meet the diverse needs of our valued customers.

Control MethodDetail
Material Inspection:Verify the material's composition, heat treatment, and quality upon receipt. Conduct metallurgical analysis to ensure the material properties meet the standards.
Process Control:Implement strict process control measures for heat treatment, machining, threading, and any other manufacturing steps. Maintain consistent process parameters to ensure uniform quality.
Equipment Calibration:Regularly calibrate manufacturing equipment to ensure accurate measurements and consistent results.
Inspection Points:Introduce inspection points at various stages of manufacturing to check for defects, dimensions, and quality. Inspect threading, dimensions, surface finish, and other critical parameters.
Sampling and Testing:Regularly sample products for testing, such as tensile testing, hardness testing, and metallurgical analysis, to ensure they meet the required specifications.
Thread Inspection:Thoroughly inspect threading using proper thread gauges to ensure accurate dimensions and fit with mating components.
Traceability:Implement a traceability system to track each fasteners journey from raw material to final product. This aids in accountability and recalls if necessary.