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Structural timber connectors and masonry plates depend on code-tested fasteners to achieve published load capacities. Simpson Strong-Tie connectors should always be installed using the specific structural screws, concrete anchors, and installation tools with which they were tested and code-listed. Arlington Coal and Lumber supplies genuine Simpson Strong-Tie fasteners and specialized driving tools for trade contractors and builders. Our product line includes Simpson Strong-Drive SDS 1/4-in structural wood screws in 1-1/2-in, 2-1/2-in, 3-in, and 3-1/2-in lengths, SD structural connector screws in #9 x 1-1/2-in, #9 x 2-1/2-in, and #10 x 1-1/2-in sizes, SDWC truss screws in 4-1/2-in and 6-in lengths paired with the Quik Stik installation tool, Titen Turbo concrete and masonry screws in 3/16-in and 1/4-in diameters featuring hex and flat heads in lengths from 1-1/4-in to 4-in, matching 5/32-in and 3/16-in carbide masonry drill bits, and the Titen Turbo installation tool kit.

Framing contractors, deck builders, and trade professionals throughout Greater Boston, Massachusetts, New Hampshire, and the surrounding New England region rely on our regional lumberyards for tested structural fasteners. Obtain job site estimates or schedule counter pickup at any of our local locations: Arlington Coal and Lumber Company, Burlington Lumber Company, Wilmington Builders Supply, Sudbury Lumber Company, Chelmsford Lumber Company, and Hudson Lumber Company. Compare head styles, thread lengths, and package quantities in our online product catalog, contact us for technical fastener selection assistance, or sign up for a trade account to manage project orders.

Select structural fasteners based on substrate material and engineering requirements. For wood-to-wood and metal-connector-to-wood applications, the SDS25112 is a 1/4-in x 1-1/2-in structural screw featuring a 3/8-in hex drive and a Type 17 reamer point engineered to drive without predrilling. Its double-barrier coating provides corrosion resistance rated equivalent to hot-dip galvanizing, making it suitable for general exterior and preservative-treated wood applications; standard packs contain 25 screws. For solid concrete, concrete block, and brick, the Titen Turbo is a high-performance screw anchor designed to cut threads into predrilled masonry holes. Hex-head models seat on top of fixture plates, while flat-head models feature a 6-lobe drive designed to countersink flush with fixture surfaces. Simpson limits Titen Turbo anchors to dry interior, non-corrosive environments; for exterior concrete or wet locations, select stainless steel or hot-dip galvanized anchors from our anchors section, which includes anchor bolts for cast-in-place applications. Drill bit sizing is critical: Simpson specifies a 5/32-in carbide bit for 3/16-in Titen Turbo anchors and a 3/16-in bit for 1/4-in anchors. For laminating engineered lumber beams (LVL, LSL, and PSL), explore our structural screws section.

Buyer's guide: Answers to frequent technical questions regarding structural fasteners and masonry anchors.

• What are the functional differences between Titen Turbo, SDS, and SDWC fasteners? Titen Turbo is a masonry screw anchor engineered for fastening fixtures to dry concrete, brick, or concrete block. The SDS is a 1/4-in heavy-duty structural wood screw designed for mounting metal timber connectors and structural wood-to-wood joints. The SDWC is a long structural screw engineered to connect top plates to rafters or roof trusses, installed from the floor using the Quik Stik installation tool.
  
  
• What drill bit diameter is required for Titen Turbo masonry anchors? Simpson requires a 5/32-in carbide bit for 3/16-in diameter Titen Turbo anchors and a 3/16-in bit for 1/4-in diameter anchors. For example, the 5/32-in x 4-1/2-in MDB15412 bit is sized exclusively for 3/16-in anchors; 1/4-in anchors require a 3/16-in diameter masonry bit.
  
  
• How do I calculate required Titen Turbo anchor length and hole depth? Determine anchor length by adding the fixture thickness to the required embedment depth. Simpson design tables base allowable loads on a 1-3/4-in nominal embedment depth, a minimum hole depth of 2-1/4-in (1/2-in deeper than embedment to accommodate dust), a minimum concrete slab thickness of 3-1/4-in, and a minimum edge distance of 1-3/4-in. Fastening a nominal 2x sill plate (1-1/2-in thick) requires a minimum 3-1/4-in anchor length.
  
  
• Can Titen Turbo anchors be installed in exterior applications or pressure-treated mudsills? No. Simpson limits standard carbon-steel Titen Turbo anchors to dry interior applications. For exterior applications, wet environments, or preservative-treated mudsills, select anchors engineered for high-corrosion exposures, such as Titen HD stainless steel screw anchors or code-prescribed hot-dip galvanized anchor bolts.
  
  
• When should I choose a hex-head versus a flat-head masonry anchor? Hex-head anchors drive with a socket (1/4-in socket for 3/16-in anchors; 5/16-in socket for 1/4-in anchors) and seat directly against fixture surfaces, ideal for metal brackets and wood plates. Flat-head anchors feature a 6-lobe drive (T25 for 3/16-in; T30 for 1/4-in) designed to countersink flush, essential for door frames, window bucks, and wooden furring strips.
  
  
• Can SDS structural screws replace traditional lag screws in timber framing? Yes, but only where specified in Simpson connector load tables or approved by a structural engineer. SDS screws drive without predrilling and provide published ICC-ES code listings, but an unengineered size-for-size replacement of lag screws is not permitted. Always install the exact SDS diameter and length specified by the connector design table.
  
  
• Are SDS screws approved for use in pressure-treated lumber? Yes. The double-barrier coating on SDS screws provides corrosion resistance equivalent to hot-dip galvanizing, approving them for general exterior use and standard ACQ/copper-based treated wood. For severe environments, such as ground contact or coastal salt-air exposures, select type 316 stainless steel SDS screws.
  
  
• What is the Quik Stik tool, and can SDWC screws replace metal hurricane ties? The Quik Stik is an extension installation tool that holds a 6-in SDWC truss screw at the proper angle to drive it through top plates into rafters or trusses from the floor. Code listings approve SDWC screws as engineered alternatives to hurricane ties for rafter-to-plate uplift connections; however, remaining load path connections (such as top plate to stud) still require dedicated hardware. Confirm required screw length (4-1/2-in or 6-in) based on top plate thickness.
  
  
• Must fastener coatings match the protective finish of the connector? Yes. Simpson mandates pairing ZMAX (G185) or Hot-Dip Galvanized (HDG) connectors with hot-dip galvanized or approved double-barrier coated screws, and stainless steel connectors exclusively with stainless steel fasteners to prevent accelerated galvanic corrosion.
  
  
• What components are included in the Titen Turbo installation kit? The Titen Turbo installation kit contains six components: a 6-lobe bit socket, T25 and T30 drive bits, 1/4-in and 5/16-in hex drive sockets, and a protective storage pouch, enabling driving of both head styles and anchor diameters.
  
  

Popular connector fastener applications:

• Basement wall framing: Fasten wooden furring strips, interior partition plates, and electrical enclosures to dry concrete or masonry walls using flat-head and hex-head Titen Turbo anchors.
  
  
• Door, window, and threshold installations: Secure bucks, subframes, and sill thresholds flush to masonry openings using flat-head countersinking Titen Turbo anchors.
  
  
• Structural connector installation: Mount heavy-duty Simpson timber connectors quickly using SDS structural screws without predrilling.
  
  
• Rafter and truss top-plate connections: Install SDWC structural screws overhead using the Quik Stik extension tool to achieve required wind uplift ratings without metal tie plates.
  
  
• Utility brackets and masonry equipment mounting: Mount heavy equipment racks, storage cleats, and electrical panels to concrete walls using hex-head Titen Turbo anchors.
  
  

We also supply a comprehensive selection of genuine Simpson Strong-Tie wood connectors, including brackets and braces for wall framing, corners and angles for 90-degree framing joints, joist hangers in face-mount and slant-skew configurations, protective mending and nail plates to guard in-wall utility runs, heavy-duty post bases and caps for column anchoring, and structural straps and ties such as the DTT1Z deck tension tie kit.

Complete your project materials package with structural building materials, bulk commercial fasteners, trade hardware, framing lumber, composites, and plywood, and architectural moulding and millwork. Explore all product categories online or contact your nearest Arlington Coal & Lumber location to schedule your order.