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Fast metal fastening can remove a separate drilling step when the screw itself is designed to drill, tap and fasten. GNKUMAR EXIM states hardened P2, P3 and P5 drill points, precision threading, heat-treated carbon steel and EPDM bonded sealing washers.
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Pilot holes are not required for the fastening method described in the source. These self-drilling screws use an integrated hardened drill point and precision thread geometry to penetrate sheet metal and structural steel purlins, then secure the connection in the same operation.
The source also states heat-treated carbon steel for torsional strength and an EPDM bonded washer for weather-resistant sealing. Depending on drill point size, drilling capacity is stated up to 12 mm steel plate. Metal roof cladding, side wall panelling and PEB structures are named applications, giving trade buyers clear substrate and use-case checkpoints for an enquiry. GNKUMAR EXIM Self Drilling Screws is described for Sheet metal fastening, metal roof cladding, side wall panelling and PEB structures. Stated product facts include Product type: Self-drilling screws; Drill point: Hardened integrated drill point; P2, P3 and P5 sizes stated; Threading: Precision thread geometry; Sealing washer: Weather-resistant EPDM bonded sealing washer; Material: Heat-treated carbon steel. Stated functions and benefits include Drills, taps and fastens in a single operation without pre-drilled pilot holes; EPDM washer is stated to provide a watertight seal; High torsional strength is stated to reduce head snapping during high-torque driving.
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