Hillman Fasteners 48642 Ss Star Trim Screw 3in No.8

Product Description

The HILLMAN FASTENERS 48642 is a No. 8 by 3-inch stainless steel star drive trim screw designed for exterior trim, decking, and finish carpentry applications. It features serrated threads that reduce drive torque and a 6-point star drive system that eliminates cam-out during installation. Four sharp countersinking blades allow the screw to seat flush without pre-drilling a countersink. The coarse thread pattern delivers strong holding power in wood substrates, and a knurled shank section reduces the risk of splitting at board edges. Sold in a box of 12 screws.

This trim screw suits residential and light commercial exterior installations where corrosion resistance is required. The stainless steel construction makes it appropriate for pressure-treated lumber, cedar, redwood, and composite trim boards exposed to moisture. Licensed carpenters, finish contractors, and deck builders will find it useful where a clean, recessed fastener head is the goal. The sharp point starts without pre-drilling in most softwood and composite trim applications.

Key Features

• 6-point star drive system eliminates cam-out for consistent power-tool driving
• Serrated threads reduce drive torque and minimize surface tear-out
• 4 sharp countersinking blades seat the head flush without a separate countersink step
• Coarse thread for high holding power in wood and composite trim
• Knurled shank section reduces board splitting near edges
• Stainless steel construction resists corrosion in exterior and treated-lumber applications
• Backed by a lifetime guaranty from the manufacturer

Compatibility

Designed as an OEM-style trim fastener suitable for use with wood, cedar, redwood, pressure-treated lumber, and composite trim boards in exterior finish and decking applications.

Installation Notes

Installation is typically performed by finish carpenters or deck contractors using a power driver fitted with a T-star bit sized for No. 8 fasteners. Shut off or unplug the driver before changing bits or clearing jams. Drive at moderate speed to avoid overdriving the countersinking blades past flush. When working near board ends or edges, maintain minimum edge distances per the lumber or composite manufacturer guidelines to avoid splitting.