ST. LOUIS SCREW & BOLT is one of the longest operating bolt manufacturers in the United States and, in fact, the world. ST. LOUIS specializes in ASTM F3125 High Strength Structural Bolts (120 ksi & 150 ksi) In grades: A325 Type I & III Heavy Hex A490 Type I & III Heavy Hex F1852 / A325 Tension Control (TC Bolts) F2280 / A490 Tension Control (TC Bolts) In finishes: Plain - Hot Dip or Mechanically Galvanized F1136 Zn/Al Dacromet® & Geomet® F2833 Zn/Al Magni 565® Other products: Weld Studs - Anchor Bolts - Tie-Rod Assemblies Concrete Mechanical - Adhesive Anchors Low Carbon (A307) Bolts. ST. LOUIS also sells and services Wrenches for TC and Hex Bolts, along with stocking several different types of fasteners. Please check out our products for a more in depth look. We are members of several fastener industry associations including the Industrial Fastener Institute. At ST. LOUIS SCREW & BOLT we are always interested in what is going on in the Construction business which is why we have joined several associations like; National Steel Bridge Alliance American Institute for Steel Construction and many steel fabrication associations just to name a few. ST. LOUIS SCREW & BOLT has well trained, experienced personnel who know construction bolting and can help provide answers to your toughest bolting questions.