https://fosterfarrar.com/products/fastenmaster-timberlok-6-in-countersunk-hex-washer-structure-screw-12-ct
Fastenmaster Timberlok 6 In. Countersunk Hex Washer Structure Screw (12 Ct.) - Northampton, MA -...
No pre-drilling. Countersinking head style. Heat-treated for increased strength. Heavy-duty threads for holding power. Easily removable. The OMG TimberLok is...
https://www.railwaysleepers.com/railway-sleeper-accessories/timberlok-railway-sleeper-screws
Timberlok railway sleeper screws from Railwaysleepers.com
Railway Sleepers, Barrels, Telegraph Poles, New, Used
railway sleepertimberlokscrews