15 x 4" Black T-30 Wafer Head Lag Screw 25/Bucket
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Overview
The BIG TIMBER 15 x 4" Black T-30 Wafer Head Lag Screw (WTX154-25) is designed for heavy-duty wood fastening applications, including structural connections in treated lumber assemblies.
| Specification | Detail |
|---|---|
| MPN | WTX154-25 |
| Brand | BIG TIMBER |
| Size | 15 x 4" |
| Drive Type | T-30 (Torx) |
| Head Style | Wafer Head |
| Finish | Black |
| Package Quantity | 25 per bucket |
| Package Weight | 1.38 lb |
| Category | Hardware Fasteners > Screws |
| Treated Lumber Compatible | Yes |
Technical Features
- T-30 Torx Drive: The six-lobe torx recess provides increased driver contact area compared to Phillips or slotted drives, reducing cam-out during high-torque installation.
- Wafer Head Profile: The low-profile wafer head seats flush or near-flush against the material surface, minimizing protrusion in finished assemblies.
- Black Finish: Provides a consistent, uniform appearance suitable for exposed structural and decorative applications.
- Treated Lumber Compatibility: Formulated or coated to resist degradation when used with pressure-treated lumber, extending fastener service life in chemically aggressive wood substrates.
- Bucket Packaging (25-count): Sold in a resealable bucket format, allowing organized jobsite storage and inventory management.
Applications
- Structural fastening into pressure-treated lumber in decking, framing, and outdoor construction.
- General lag screw applications requiring a low-profile head in wood-to-wood connections.
- Use in environments where treated lumber is specified, including ground-contact and above-ground structural assemblies.
Corrosive Environment Notice: This fastener is compatible with treated lumber under standard conditions. For installations within one mile of saltwater, near swimming pools, in areas with exposure to corrosive chemicals, or in livestock confinement environments, BIG TIMBER recommends upgrading to the appropriate size, grade, and type of BIG TIMBER Stainless Steel Fasteners to ensure long-term corrosion resistance.

















































