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Special self-tapping screws

  • Description

  • Heads

  • Recesses

  • Threads

  • Tips

  • Description

autofilettanti speciali viti mustad

special self-tapping screw


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.


CARBONITRIDING HEAT TREATMENT
More info: heat treatment


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.


autofilettante tc ph zincata bianca mustad vis viti screw
Deep recess to ensure secure matching with the screwdriver.

mustad autofilettante ph schema punta avvitamento
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.

mustad viti vis screw
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.

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  • Heads

Types of head

testa fungoMUSHROOM HEAD

This shape of head combines the minimum height with a better surface of contact with respect to the normal pan head.

teste fungo flangiateFLANGED 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.

mustad screwSERRATED HEAD

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.

testa esagonale con collareHEXAGONAL 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

teste con rondella imperdibileVISTOP®

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.

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  • Recesses

Types of recess

cava croce phPHILLIPS ‘PH’ RECESS

The standard head for screws.

cava croce pzPOZIDRIV ‘PZ’ RECESS

The particular shape of the recess and the larger number of points of contact between the head and the bit reduce the “come-out” effect and the wear of the bit itself.

chiave esalobata tx‘TX’ SIX LOBE RECESS

Due to its vertical walls, it eliminates the ‘come-out’ effect.

antimanomissione ta‘TA’ TAMPER-PROOF

Indicated for applications in which unscrewing must be performed exclusively by qualified staff.

chiave esagonaleHEXAGONAL

Indicated where the application of high tightening torque is required.

chiave esagonale collareHEXAGONAL WITH COLLAR

The collar increases the supporting surface, protecting the part from the action of the tightening bush at the same time.

combi esalobata tx cacciavite‘TX’ SIX LOBE COMBI – SLOTTED RECESS

Combines the universal nature of the slotted recess with the characteristics of the six lobe recess.

combi croce cacciaviteCOMBI CROSS – SLOTTED RECESS

Combines the universal nature of the slotted recess with the characteristics of cross recesss.

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  • Threads

Types of thread

FULLY THREADED

The thread right to the head allows the gripping of extremely thin sheet metal.

parzialmente filettataPARTIALLY THREADED

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.

filetto passo CTHIN 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.

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  • Tips

Types of tip

autofilettante ounta standard viti mustad

STANDARD

Threaded right to the end to allow the screw to deform the material gradually, creating a ‘drawing’ effect, which increases the grip on thin sheets.

punta flat

FLAT

BZ type with gradual entry which facilitates entry in the hole and reduces the risk of injuries during the assembly, handling and maintenance of the part assembled.

punta tronca

TRUNCATED SCREW

As it has no gradual entry, it guarantees the grip of the material into which it is screwed right from the start of the shank.

punta pilota

PILOT

The unthreaded conical section favours the alignment of the parts to be assembled, even in the presence of offset holes.

punta arrotondata

ROUNDED

Used through holes on complexes subject to subsequent handling by operators.

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luciano2020-04-14T20:00:48+02:00

Title

Mustad S.p.A.
Via Sant’Anna, 59/21
10070 Balangero (TO) Italy
Tel. +39 0123 346222
mustad@mustad.it

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iso iatf mustad
© Copyright MUSTAD S.p.A. 2020 | Balangero/Pinerolo (TO) ITALY | Tel. (+39) 0123.346222 | mustad@mustad.it | P.IVA IT 05801010017 | Customized by Studio Erica
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