Type 17 Roofing Screw, AS 3566 Class 3 Manufacturer

Overview

Built for roofing over timber battens to the Australian standard AS 3566. A Type 17 auger point cuts timber fibres cleanly so the screw starts fast without a pilot hole, and the Class 3 coating suits most non-marine exterior sites.

Minimum tensile strength 12.5 kN, shear 8.5 kN and breaking torque 13.2 N·m.

Applications

Roofing over timber battens
Timber frame cladding
Rural sheds

Key features

Type 17 point starts without pilot hole
Class 3 coating for exterior roofing
Head marking available
Tested tensile, shear and torque

Specifications

Typical values. Every dimension, hardness and coating is confirmed in writing with your quotation.

Type 17 Roofing Screw, AS 3566 Class 3 specifications
Standard	AS 3566.2 Class 3
Size	#12-11 × 75 mm (3")
Material	C1022A, case hardened
Head	Indented hex flange
Point	Type 17
Washer	Pre-assembled black EPDM
Coating	Ceramic, 1,000 h salt spray
Tensile	≥ 12.5 kN
HS code	7318.14 / 7318.12 (by type)

Buying guide

Applies to all self-drilling screws.

Match the drill point to the steel

Point #1 suits sheet up to 0.9 mm, #2 up to 2.8 mm, #3 up to 4.4 mm, #4 up to 5.25 mm and #5 up to 12.5 mm. The drill flute must clear the full material thickness before the thread engages, or the screw will jam and snap.

Choose a washer for weather-tight joints

Roofing and cladding screws take a bonded EPDM washer (14, 16 or 19 mm) under an indented hex washer head. The rubber seals the hole; the steel backing spreads the load so the sheet does not dimple.

Specify corrosion class, not just "zinc"

Electro-zinc gives roughly 72 h to white rust in salt spray. For exterior roofing ask for ceramic coating (500–1,000 h) or AS 3566 Class 3/4 coatings, and for coastal sites move to bi-metal stainless screws.

Ordering

Packing and delivery

Standard terms for this product. Tell us if your market needs something different.

PackingSmall boxes, buckets or 20–25 kg cartons on fumigated pallets; private label available.

Lead timeSamples in 7 days; production 25–35 days after deposit.

PaymentT/T 30 % deposit, 70 % against B/L copy, or L/C at sight.

ShippingFOB Shanghai or Ningbo, CFR or CIF to your port.

Questions about this product

What is the difference between self-drilling and self-tapping screws?

A self-tapping screw forms threads in a pre-drilled hole, while a self-drilling screw drills its own hole first using a drill-shaped point. Self-drilling screws save a step on metal-to-metal joints.

Which standards do your self-drilling screws follow?

We produce to DIN 7504 (K, M, N, P, O forms), ISO 15480–15483 and AS 3566.1/.2, and to customer drawings for non-standard lengths, heads or head marks.

What is your MOQ for self-drilling screws?

Standard sizes start at about 500 kg or 50,000 pieces per size. Mixed sizes can share one container, and stock items can ship in smaller lots.

Self-Drilling Screws