MOUNTING SCREW 4,2x25 PUUR/MUST TX20/ÜP/C3/ 20tk
DESCRIPTION MOUNTING SCREW 4,2x25 PUUR/MUST TX20/ÜP/C3/ 20tk price 4.75€ ESSVE
Madala kumera peaga kruvi, roostevaba seibiga, värvitud, mõeldud veelaua kinnitamiseks viilulauale või viilulaua pleki paigaldamiseks puidust aluspinnale või pleki kinnitamiseks plekile välistingimustes.
Kirjeldus
Kruvi on valmistatud karastatud süsinikterasest ja on läikivaks tsingitud pinnatöötlusega 20 µ. Seib on valmistatud roostevabast terasest A2 ja sel on must EPDM-tihend. Kruvi ja seib on pulbervärvitud ja saadaval tavalisemates värvitoonides.Kruvil on madal kumer pea ja TX otsakupesa. Kruvil on vähendatud puurots. Kruvi on puuriv ja keermestav, puurimisjõudlus terases 2 x 1,25 mm.
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Frequently asked questions about the MOUNTING SCREW 4,2x25 PUUR/MUST TX20/ÜP/C3/ 20tk
What is the MOUNTING SCREW 4,2x25 PUUR/MUST TX20/ÜP/C3/ 20tk?
MOUNTING SCREW 4,2x25 PUUR/MUST TX20/ÜP/C3/ 20tk is a low-profile, drill-point mounting screw with a stainless steel washer and black EPDM seal. Made from hardened carbon steel with glossy zinc plating 20 µ, TX20 drive and designed for fixing bargeboard or roofing sheet to timber substrate.
Is this screw suitable for external steel sheet roofing?
Yes. The screw is designed for outdoor use: it has a drill point, a stainless steel washer with EPDM sealing and powder-coated finish, making it suitable for fixing steel roofing sheets to timber substrate.
What are the screw dimensions and how do they affect choice?
The screw is 4.2 mm in diameter and 25 mm long (4,2x25). The 25 mm length is suitable for fixing roofing sheet or bargeboard to timber battens; choose a longer screw only if your substrate or layered materials are thicker.
What is the thread and drilling capability of this screw?
The screw has a drill point and is self-threading during installation. Its drilling performance in steel is 2 x 1.25 mm, so it can drill thin steel sheets and form threads into the substrate.
Can this screw be used on thin steel roofing without pre-drilling?
Yes. With its reduced drill point and drilling performance of 2 x 1.25 mm in steel, the screw can penetrate thin roofing sheets without pre-drilling, provided you use the correct screw length.
What materials are the washer and seal made from and why does it matter?
The washer is stainless steel A2 and the seal is black EPDM. Stainless steel prevents corrosion while the EPDM provides watertight sealing against moisture and temperature changes—important for roofing and external cladding.
What head type and driver bit do I need to install?
The screw has a low-round (pan) head with a TX (Torx) recess — use a TX20 bit for installation. TX20 provides secure drive engagement and reduces cam-out.
What colours are these screws available in and can I match my roof?
The screw and washer are powder-coated and available in common colour tones. You can choose a finish that matches typical roofing or cladding colours for a neat appearance.
Can these screws be used to fix onto a metal batten/frame?
With drilling performance of 2 x 1.25 mm in steel, the screw can be used on thin metal battens. For thicker metal framing or heavier loads, choose a longer/stronger screw designed for that application.
How many screws are in a pack and is it enough for a small repair?
The name includes 20tk — there are 20 screws per pack. That quantity is typically sufficient for a small roof repair or replacing fixings on a few panels.
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