Which screws and bolts fit Veritas T-slot tracks?
It depends on which Veritas T-slot track you have:
Narrow T-slot track (for example 610 mm, 12K79.22): made for 1/4-20 hardware, with T-slot nuts or T-bolts. Also available in 914 and 1219 mm.
Wide T-slot track (for example 1200 mm, 12K79.38): made for 5/16-18 hardware. Standard M8 bolts also fit. Also available in 600 and 900 mm.
With special hex bolt washers, sold as accessories, you can use ordinary hex bolts. Nuts, bolts and washers are sold separately.