Screws for direct screwing into: sheet metal, metal laminates, alloys, plastic materials without tapping or using nuts. For more information, contact our sales offices for technical support in choosing the screws and to order samples: > Contacts
RECESS deep to ensure secure matching with the screwdriver. A deep recess, of a perfect shape, enables he same insert to be used for thousands of screwing operations.
THREAD up to below the head, to allow the gripping of extremely thin sheets.
TIP threaded right to the end, to allow the screw to gradually deform the material, creating a “drawing” effect, which increases the grip on thin sheets.
GALVANIC TREATMENT The self-tapping screw are available in various treatments. More info: finishing treatments
IN PROCESS CONTROLS The entire manufacturing process is subjected to SPC (Statistical Product Control), which guarantees a constantly high level of quality in time. The batch number on the labels ensures absolute traceability of all the phases of production and related control/test documents.
CALIBRATED SCREWS The Mustadscrews are manufactured with stricter-than-standard tolerance limits. They can therefore be defined as ‘calibrated’, that is, capable of sliding more easily in the guides and loading tubes of screwing machines.
Deep recess to ensure secure matching with the screwdriver.
Diagram of the action of the tip of the Mustad self-tapping screw that creates the drawing effect, i.e. a deformation of the material that increases the gripping of thin sheets.
Section of the screw that shows the characteristics of the carbonitriding treatment.
Graph comparing a Mustad self-tapping screw with a traditional screw that demonstrates how the SPC process improves the average production quality and the tolerance.
This shape of head combines the minimum height with a better surface of contact with respect to the normal pan head.
FLANGED MUSHROOM HEAD
This type of screw is used to: – assemble very thin materials – give a better aesthetic effect to the part assembled – cover slotted holes with a larger diameter than the standard size of the pan head. The flange may have various diameters according to the application to be performed.
These screws satisfy the need to obtain fixtures with higher vibration resistance, in that the recess made by the tightening of the screw produces an anti-loosening effect. Recommended also to obtain ground contacts on electrical parts.
HEXAGONAL AND HEXAGONAL WITH COLLAR
Hexagonal-head self-tapping screws for applications that require a high tightening torque. In the version with a collar, it ensures an excellent distribution of the axial force, protecting the surface of the part to be assembled against contact with the tightening bush.
Head with captive washer
These screws with a preassembled captive washer are manufactured with a pan head or hexagonal head. Their advantage lies in the simplification of assembly in mass production. Smooth washer: for the gripping of very thin metal sheets or plastic without damaging the surface gripped, or to cover large slotted holes. Serrated washer: to obtain connections with an extremely high vibration-resistance.
The thread right to the head allows the gripping of extremely thin sheet metal.
When the hole in the part to be assembled is sized correctly, the screw becomes captive, increasing also the resistant section at the joining point.
THIN SHEET METAL THREAD
These screws allow high tightening torques to be applied and thus effective gripping, in sheets with a thickness of ≤ 1 mm as the special tip and close threads, produce a drawing effect on the sheet, increasing the number of threads gripped.