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GEFU® thread-rolling screw With Taptite 2000® thread, countersunk head and hexalobular drive
DIN 7500-1, steel case-hardened (-O-) zinc flake coating silver (ZFSHL) with slide coating
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Variants
Self-tapping screws form a nut thread in cast blind holes, rim holes and drilled, lasered and punched sheet metal parts. Unlike thread cutting, self-tapping does not interrupt the material structure in the receiving thread. Instead, the material is displaced and strain-hardened.
- Cost savings
Eliminates thread cutting
- Non-cutting thread formation
- Low rolling torques with greater thread flank overlap
TRILOBULAR shape of the core diameter combined with the radius profile of the thread flanks
- High clamping force due to low rolling torques
- High load-bearing capacity due to large flank overlap of thread and strain-hardened counter thread (nut thread)
- Protection against loss (reduced likelihood of screw working loose)
Play-free and self-locking thread seating
- The formed thread corresponds to a standard metric thread
Where necessary, the GEFU screw can be replaced with a metric screw
The suitability of the GEFU for the application or component in question must be determined through preliminary testing. Guideline values for suitable hole diameters are specified in DIN 7500-2.
Examples of materials suitable for this type of non-cutting direct screwing are ductile materials such as steel (up to approx. 500 N/mm²), die-cast zinc, aluminium, copper, copper alloys etc.
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