STAINLESS STEEL HEXALOBULAR PAN THREAD ROLLING SCREWS DIN 7500C

Hexalobular Pan Thread Rolling Screws DIN 7500C — This is the hexalobular-drive counterpart to the Pozidriv DIN 7500C pan head thread rolling screw, and the reason to choose it comes down to torque: because thread forming displaces material rather than cutting it, the driving operation demands higher, more sustained torque than installing a standard tapped screw, and hexalobular's six-lobed recess resists cam-out under that torque far better than a Pozidriv cross recess — particularly valuable in automated assembly where a slipped driver during thread forming can damage the screw head or leave a badly formed thread. Head shape, thread-forming behaviour, and pilot hole sizing are otherwise identical to the Pozidriv version; only the drive recess changes.

Typical applications are automated production lines assembling castings, plastics or sheet metal components, and any high-volume manufacturing process wanting consistent, repeatable thread-forming torque without the driver slip that would risk an incomplete or damaged thread partway through forming. As with any thread rolling screw, the pilot hole is the critical dimension — sized to the specific thread and material combination, not a generic clearance or tapping-drill size — and that requirement doesn't change based on drive recess.

Grade choice follows the standard pattern for thread-forming fasteners: A2 stainless for general indoor assembly into plastics, sheet metal, or castings, A4 for anything facing outdoor, washdown, or chemically aggressive conditions, since a corroded formed thread is considerably harder to service or replace than a standard tapped joint once the assembly is built up.

Confirm the exact pilot hole size for the thread and material combination before drilling, and reach for this hexalobular version specifically where cam-out during the higher-torque thread-forming operation has caused problems with a Pozidriv equivalent, or where the line is automated enough that consistent torque transfer matters more than driver cost.

FAQs
Does the pilot hole size differ from the Pozidriv version?
No. Hole sizing is determined by the thread-forming requirement of the screw and material, not by the drive recess type. Confirm the exact hole size for the specific thread and material combination being used before drilling.

Why does drive type matter more for thread rolling screws?
Thread rolling screws typically need higher, more consistent driving torque than standard machine screws since they're forming their own thread. Hexalobular's low cam-out and high torque capacity make it well suited to this higher-torque driving requirement, particularly in automated assembly.

Is hexalobular worth the extra cost over Pozidriv for a hand-assembled, low-volume thread rolling job?
Not necessarily. Hexalobular's real advantage is in sustained, powered, high-volume driving; for occasional hand assembly, a Pozidriv thread rolling screw performs adequately at a lower cost.