Bugle Batten Timber Screws

Measure across the outside of the thread - not the shank - to get the gauge (an 8g screw measures about 4.2mm). Screw gauges have a wider tolerance than bolts, so treat it as a close match rather than exact. Then measure the length - countersunk timber screws are measured overall, head included.
Every product page carries a Screw Gauge and TPI chart for its range - every gauge links straight to the product. Rule of thumb for timber: coarse threads for softwood and framing, fine threads for hardwood.

Bugle batten timber screws have a curved bugle head that pulls down flush into softwood without splitting or a pre-drilled countersink. The T17 self-drilling point cuts straight in without a pilot hole, and the part-thread (smooth shank under the head) draws the board hard against the joist for a tight, rattle-free fix.
GRADES AND MATERIALS
Stocked in Class 3 and Class 4 coated carbon steel and G304 stainless. Class 4 and stainless suit treated pine and exposed outdoor work; Class 3 suits dry interior framing and battens.
DRIVE AND INSTALLATION
In-Hex (Allen) drive for high torque without cam-out - drive straight in with the T17 tip, no pilot hole needed in most softwoods. For dense hardwood, drill a small pilot to avoid snapping.
SIZE AND THREAD
Gauges 8g to 14g, lengths 30mm to 200mm. Coarse thread for grip in softwood, batten and framing timber. Match the length so at least half the screw engages the receiving timber.
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A curved bugle head that self-embeds flush into timber without a pre-drilled countersink, on a T17 self-drilling tip and a part-thread shank that pulls boards tight to the joist. In-Hex drive, 8g to 14g, 30mm to 200mm.
TECHNICAL RESOURCES
Pilot-hole, drive size and gauge reference: Technical Resources. For In-Hex bits, see Hex Bits. Choosing a finish? See our guide to choosing a screw coating, and match the size on our screw gauge sizing chart.




