Experience The PrimeSource Difference PrimeSource is the largest purveyor of fasteners in the world and one of the largest distributors of building materials in North America. Built Right.Grip-Rite As the Grip-Rite line continues to grow, we are excited to offer solutions to jobsite challenges & construction needs across the country. Global Reach. Hometown Service. With 42 locations across North America and international service, we offer delivery of what you need, whenever & wherever you need. Strength Of Our People Our dedicated 1,200 employees work out of local D.C.’s, so we get to know our partners and they get to know us!