#14×4″ T-25 Bronze Construction Lag Screws

The Superior Alternative to Ordinary Lag Screws

When strength and durability are non-negotiable, Big Timber’s CTX™ Construction Lag Screws deliver unmatched performance. Heat-treated and hardened for superior tensile strength, these screws are engineered for the toughest structural applications. Each screw is equipped with deep, sharp-cutting threads, a corrosion-resistant triple coating, and a round washer head with smooth edges for a professional finish. Designed to eliminate pre-drilling, these screws make installation as easy as it gets—without sacrificing power.

CTX™ Lag Screw Features

• Triple-Layer Bronze Coating
  ACQ-compatible and rated for 1200 hours of corrosion protection in salt spray and ACQ conditions, making these screws ideal for both interior and exterior use.
• Built for Ultimate Holding Power
  With deep, wide threads and a six-lobe star drive, these screws grip tight, ensuring maximum hold in demanding applications. The aggressive knurl design helps draw lumber together with reduced splitting and drag.
• Engineered for Smooth Installation
  Featuring V-cut notches and a Type 17 tip, each screw cuts fibers for easy insertion, minimizing “walking” for precise starts—no pre-drilling required. The wax coating further reduces torque, giving you a smoother, faster drive.

Built Tough for Structural Projects
Perfect for rugged applications, these lag screws excel in log construction, timber frames, laminated beams, ledger boards, stair rails, deck posts, fencing, SIP panels, and pole barns. Their built-in washer head and self-countersinking nibs add strength and a sleek finish, making them ideal for visible structural work.

Specifications & Options

• Available in:  Individual, 1lb loose (Approx. 32/lb), or bulk cartons (500ct)
• Product Weight: 0.03lb, 1lb, 15.2lb
• Size Options: Available in a range of lengths and diameters to meet all your construction needs, from 1″ to 16″ lengths.

For areas prone to high corrosion, like near saltwater or pools, opt for Big Timber’s SCTX stainless steel lag screws to maintain maximum durability.

Certified Performance
Independently tested (TER 1907-01) and compliant with the International Building Code and International Residential Code, Big Timber CTX™ lag screws are the trusted choice for builders who need superior strength and reliability.