Stainless Steel Carbon Steel Black White Hex Washer Head Drilling Screw with Epdm Washer

This series of composite drill tail screws (also known as roof drill tail nails or self-tapping screws with waterproof pads) are specialized fasteners designed specifically for color steel sheets, metal roofs, and steel structure enclosure systems, integrating drilling, threading, locking, and waterproof sealing functions. The product features an external hexagonal head + self-drilling drill tail structure, combined with an EPDM (ethylene propylene diene monomer) three-component rubber waterproof gasket and a nylon / galvanized washer composite structure. During the tightening process, it can complete drilling, threading, and locking simultaneously. At the same time, the rubber gasket expands due to heat, forming a permanent waterproof seal between the metal sheet and the screw, fundamentally eliminating the problem of roof water leakage. It is the core specialized component for the installation of steel structure roofs.

We offer two mainstream versions to meet different scenarios:

The black-coated model (anti-rust and wear-resistant, suitable for dark-colored roofs)

The galvanized white paint model (resistant to corrosion and anti-rust, suitable for light-colored roofs)

Without the need for additional waterproof gaskets, a single screw can complete both "locking + waterproofing" dual installation. It is an efficient upgrade solution replacing the traditional screw + waterproof gasket combination.

Core structure: Hexagonal head + self-drilling tail + composite waterproof rubber pad (EPDM rubber pad + metal / nylon gasket), integrated design, waterproof fastening in one step

Surface treatment: Black wear-resistant coating, galvanized + white paint coating, no burrs, no oil stains, excellent rust prevention and wear resistance performance

Material selection: High-quality carbon steel, tail undergoes quenching and heat treatment, high hardness, sharp cutting edge, suitable for various metal substrates

Specification coverage: Standard thread specifications M5.5/M6.3, length coverage 16mm - 100mm, suitable for different thickness color steel plates and spacing between keels

Performance: High hardness, high penetration, waterproof sealing, vibration resistance, aging resistance, suitable for outdoor roof wide temperature conditions

Installation compatibility: No need to drill holes or tap in advance, no additional waterproof pads required, directly compatible with color steel plates and light steel keels, high compatibility

Integrated with waterproofing, double the installation efficiency

Equipped with self-drilling drill tail and composite waterproof rubber pad, no need for pre-drilling or tapping, nor additional installation of waterproof pads. A single screw can complete the roof installation. One process completes both fixation and waterproofing. The installation efficiency is increased by more than 60% compared to traditional solutions, especially suitable for large-scale roof construction.

Composite waterproof structure, eliminating roof leakage

Using "EPDM rubber pad + metal / nylon gasket" composite waterproof structure, the rubber pad is evenly compressed when tightened, and after heating, it can closely adhere to the color steel sheet surface, forming a permanent seal, effectively resisting water penetration and solving the problem of roof leakage caused by aging and detachment of traditional waterproof pads.

High-hardness drill tail, strong penetration and no slipping

The screws have undergone quenching heat treatment, with high drill tail hardness and sharp cutting edge. They can easily penetrate color steel sheets, light steel keels and other substrates, drill smoothly without slipping, and the screw thread bites tightly, locking firmly and not prone to loosening, suitable for high-frequency wind vibration conditions.

Multi-version full-scenario compatibility, precise selection as needed

Black-coated model: Surface is wear-resistant and corrosion-resistant, suitable for dark color steel sheets and steel structure roofs, coating is scratch-resistant and not prone to fall out；

Galvanized white paint model： Excellent corrosion and rust prevention performance， suitable for light-colored roofs and outdoor environments， does not rust for a long time.

Weather-resistant and aging-resistant， long service life

EPDM rubber pad is resistant to high and low temperatures and ultraviolet aging， does not harden or crack easily under outdoor use； The anti-rust coating on the screw body provides adequate protection， not afraid of wind， sun exposure， temperature changes， and the service life is far longer than ordinary drill tail screws.

Installation of color steel roof: Fixed and waterproofed installation of color steel sheets for factories, warehouses, mobile prefabricated buildings, and light steel villas in one step;

Steel structure enclosure system: Connection and fixation of exterior color steel plates and profiled steel plates, suitable for various metal sheets;

Photovoltaic support roof: Installation of color steel roof for photovoltaic components, providing waterproof and rust-proof protection for long-term outdoor use;

Outdoor metal facilities: Fixation of metal plates such as billboards, barriers, and guardrails, combining fastening and waterproofing;

General industrial scenarios: Various scenarios requiring waterproof sealing of metal plates connection and equipment shell fixation.

Q:What types of fasteners do you manufacture or supply?

A:We offer a comprehensive range of fasteners including bolts, screws, nuts, washers, anchors, and specialty fastening products in various materials and finishes.

Q:Do you provide custom fasteners for specific applications?

A: Yes, we specialize in manufacturing custom fasteners tailored to customer specifications, including unique sizes, materials, and coatings.

Q:Can you supply fasteners with specific surface treatments?

A:We offer surface treatments like zinc plating, hot-dip galvanizing, black oxide coating, and powder coating to meet different corrosion resistance and aesthetic requirements.

Q:What is your minimum order quantity (MOQ) for custom fasteners?

A:Our MOQ varies depending on the fastener type and customization requirements. We can discuss your specific needs to provide a personalized quote.