Product Overview
Roofing screws are cold headed from low carbon wire with a hex or pan head and a bonded EPDM washer, and a dual lead drill point that cuts and taps through 0.5-3.0 mm galvanized or pre-painted steel in a single pass with no pilot hole. Plain zinc or a Ruspert coating takes salt spray beyond 1000 hours without red rust, and once the fastener is tightened the washer compresses into an elastic seal so the fixing hole does not leak.
Specifications
| Parameter | Value |
|---|---|
| Size | #8 / #10 / #12 / #14 |
| Length | 20 – 150 mm |
| Common sizes | #8×20 / #10×50 / #12×65 / #14×100 mm |
| Head | Hex washer head / pan head with Torx drive |
| Drill point | Dual lead / drills 0.5 – 3.0 mm |
| Finish | Zinc plated / Ruspert coating |
| Salt spray | min 1000 h without red rust |
| Washer | Bonded EPDM washer |
| Material | SAE1010 carbon steel, case hardened |
| Core hardness | HV 250 – 400 |
Applications
Used to fix galvanized and colour coated roof sheets to purlins, to install insulated sandwich panel walls and roofs, on container house exteriors, greenhouse frames, and thin sheet connections on ducting and equipment. Installation crews in Southeast Asia and Africa work on 6-8 fixings per square metre of roof and buy these by the carton.
Packing / Delivery / Payment
Inner box or bag with an outer carton holding 5-25 kg or 1000 pieces, palletised and shrink wrapped; a 20GP holds about 20-25 tons. Stock ships in 10-20 days and production orders in 25-30 days. Payment by L/C at sight or T/T with 30% deposit. Mill certificate, salt spray test report, RoHS declaration, packing list and Certificate of Origin are supplied.