Product Description
The Simpson Strong-Drive SDCF TIMBER-CF Screw (Model SDCF271958-R25) is a heavy-duty structural fastener engineered specifically for cross-laminated timber (CLT) construction, mass timber construction, and general interior applications. Measuring 0.390 in. in diameter and 19-5/8 in. (500 mm) in length, this fully-threaded screw delivers uncompromised strength where demanding structural connections require it most. A proprietary unique point ensures fast starts and excellent withdrawal resistance, while the large flat head with underhead nibs provides clean, flush countersinking. Finished in an interior-grade yellow-zinc coating, these screws are sold in a convenient 25-piece pack and include a T50 6-lobe driver bit.
Key Features
- Flat head with nibs helps countersink the screw for a flush finish
- Heavy-duty, fully-threaded shank provides strength, with superb withdrawal resistance
- Head stamp includes length in mm for easy on-site inspection
- Fully-threaded shaft for high withdrawal resistance throughout the entire fastener length
- Deep 6-lobe recess (T50) for a secure, slip-resistant drive (replacement bit: BIT50T-2-R1)
- Interior-grade yellow-zinc coating suited for dry and interior applications
- Length: 19-5/8 in. (500 mm)
- Pack quantity: 25 screws per pack
Specifications
- Model Number: SDCF271958-R25
- Series: Strong-Drive SDCF TIMBER-CF
- Overall Length: 19-5/8 in. (500 mm)
- Shank Diameter: 0.290 in.
- Head Diameter: 0.725 in.
- Thread Length: 19-3/8 in.
- Head Type: Flat Head with Nibs
- Drive Type: T50 6-Lobe
- Coating / Finish: Yellow-Zinc Coated
- Application Environment: Interior and dry applications only
- Pack Quantity: 25
- Country of Origin: Austria (AT)
Approved Applications
- Cross-laminated timber (CLT) construction
- Mass timber construction
- General interior applications
- Fastening wall-to-wall connections
Note: For interior and dry applications only.
What's Included
- 25 x Simpson Strong-Drive SDCF TIMBER-CF Screws - 0.390 in. x 19-5/8 in.
Frequently Asked Questions
- What applications is the SDCF TIMBER-CF screw designed for?
- This screw is designed for cross-laminated timber (CLT) construction, mass timber construction, and general interior applications, including wall-to-wall fastening. It is rated for interior and dry applications only and should not be used in exterior or wet environments.
- What driver bit does this screw require, and is one included?
- The SDCF TIMBER-CF screw uses a T50 6-lobe (6-lobe recess) drive. Each pack includes one T50 6-lobe driver bit. If a replacement bit is needed, the compatible replacement is the BIT50T-2-R1.
- What are the key dimensions of this screw?
- The screw has an overall length of 19-5/8 in. (500 mm), a shank diameter of 0.290 in., a head diameter of 0.725 in., and a thread length of 19-3/8 in. The screw is fully threaded along nearly its entire length to maximize withdrawal resistance.
- How many screws are included in this pack, and how can the length be verified on-site?
- This pack contains 25 screws. For easy on-site inspection, each screw head is stamped with the length in millimeters, allowing installers to quickly verify they are using the correct fastener without needing additional measuring tools.
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