Key features - One piece extrusion with straight spiral flute thread forming design for creating internal threads through a blind hole using a machine screw drill - Available in multiple metric sizes: M2, M4, M8, M10, M12, M16 - Finish color: JIS PO...TIN - Specific size for this variant: M4.0 x 0.7 - The extrusion and straight spiral flute design supports efficient thread formation and chip control during operation - Designed to form threads through a blind hole with the corresponding sizes Benefits and compatibility - Reliable internal thread formation in blind holes without requiring additional taps - Improved chip evacuation thanks to the straight spiral flute design, reducing the risk of clogging - Precise size for M4.0 x 0.7 applications, with other sizes available to suit different projects - Tin color finish (JIS PO...TIN) provides a corrosion resistant appearance and consistent surface finish Performance notes - Suitable for creating threaded features in metals and similar materials where blind holes are used - Designed for use with a machine screw drill to establish threads in the specified sizes - One piece construction simplifies tooling inventory and reduces setup complexity Use scenarios - Metal chassis or bracket fabrication: form reliable M4 threads in blind holes in aluminum or steel components during assembly - Machinery repair: restore or create blind-hole threads where only limited access is available, ensuring secure fastener retention - Electronics enclosures or tooling fixtures: install M4 screws into blind holes with consistent thread quality and improved reliability This description retains the original product branding, sizes, and intended functions while presenting clear, customer-friendly guidance on usage, benefits, and practical applications.