): The torque measured during the remainder of the unscrewing process.
The standard defines three property classes for temperature and performance:
: Note that many DIN 267 series standards are being progressively integrated into or replaced by ISO standards (such as ISO 16047 for torque/clamp force), though DIN 267-27 remains a staple for specific adhesive applications. din 267-27 pdf
The most critical data in any is the prevailing torque —the torque required to run the nut down a bolt before it contacts the bearing surface.
Conducted on a standardized reference bolt to verify the coating material's performance. ): The torque measured during the remainder of
is the primary German technical standard governing the delivery conditions and functional requirements for steel fasteners equipped with microencapsulated (MK) adhesive coatings . These coatings are pre-applied to threads to provide reliable self-locking and sealing properties upon assembly.
: Standard coatings are designed to perform reliably in service temperatures ranging from -50 °C to +100 °C , with some special applications reaching up to Thread Coverage Conducted on a standardized reference bolt to verify
The standard covers the functional properties and testing methods for a specific range of fasteners:
Before you download a , you must understand what the standard covers. It is not for standard hex nuts. Instead, it focuses on two main types of prevailing torque nuts:
Always ensure you are using the most current version of the standard (currently DIN 267-27:2024-07