10mm long (3/8in): enough to go through the sleepers and thick underlay. Self tapping: will create their own thread into the wood.
Track screws OO gauge 6mm long (x100) GVH GVSCREWS6
Track Screws N Gauge 10mm Long (x100) GVH GVSCN10
Track Screws N Gauge 6mm Long (x100) GVH GVSCN6
Golden Valley Hobbies Track Screws O Gauge 16 mm long (x100)
Track Screws O Gauge 16mm Long (x100) GVH GVSCO16
Golden Valley GVSCN6 Track Screws N Gauge 6mm Long (Pk 100)