PrecisionGeek® M4 Knurled Screws Steel DIN 653 – Black Oxide – Flat Head Without Shoulder – Various Lengths & Set Sizes (16 mm · Set of 4)

• 1. Thumb Screws Application Knurled thumb screws designed for tool-free fastening in metal, wood, plastic, and acrylic components.
• 2. DIN 653 Standard Manufactured in accordance with DIN 653, featuring a flat knurled head for stable seating and repeatable positioning.
• 3. Black Oxide Steel Construction Made from steel with a black oxide finish, providing durability and a technical, non-reflective surface.
• 4. Multiple Sizes & Set Options Available in various M4 thread lengths and different set sizes, allowing selection of the appropriate configuration for each application.
• 5. European Manufacturing Manufactured in the European Union (Poland).

PrecisionGeek Knurled Thumb Screws M4 x 16mm are the ideal fastening solution for tool-free applications in electronics, audio gear, machinery, and hobby projects. Each screw in this set of 4 is manufactured from black oxidised steel, ensuring corrosion resistance, strength, and a professional finish. Designed to DIN 653 standards, these screws feature a flat, wide knurled head for comfortable hand-tightening, making them perfect for repeated use in panels, equipment covers, 3D printers, or control boxes. Their European manufacturing quality ensures consistent threading, durable performance, and reliability where precision matters most. The knurled screws according to DIN 653 are also referred to as thumb screws. They are designed for manual operation without the need for additional tools. The finely ribbed head provides a secure grip, allowing for easy fastening and loosening by hand. Application areas: DIN 653 knurled screws are ideal for applications where frequent adjustments or disassembly are required. Their low-profile head design makes them suitable for installations where space is limited or a flush finish is desired. Common areas of use include furniture construction, electronics, mechanical and precision engineering, laboratory equipment, and various industrial applications. You will receive high-quality, professional-grade knurled screws with a metric standard thread. DIN 653 features a low head shape, meaning the screw head sits nearly flush with the surface once fully tightened, offering both functionality and a clean appearance.