Product Overview
SDHR31614 Strong-Drive COMBO-HEAD Screw (Carton of 100pcs)
SDHR 31 x 6-1/4IN zinc 100ct
The Strong-Drive SDHR Combo-Head screw is a structural fastener designed for cross-laminated timber construction, mass timber construction and general interior applications. These partially-threaded, sturdy 0.390"- and 0.470"-diameter structural fasteners are designed to pull structural members together while providing excellent connection strength. The “combination” head allows for driving using either a hex driver bit or T40 6-lobe driver bit. The SDHR Combo-Head has an interior-grade, blue zinc coating, a robust knurled shank and Type-17 point for fast starts and low-torque driving.
- Designed for use with steel side plates
- Can be driven by either a hex-head or 6-lobe driver bit
- Heavy-duty, partially threaded shaft with knurl provides strength, with superb pull-out resistance
- Type-17 point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
- Deep T40, 6-lobe recess for a secure drive (replacement bit: BIT40T-134-R2)
- Interior grade blue-zinc coating
- Steel-to-wood connections
Simpson Strong-Tie is also providing the Strong-Drive SDHR Combo-Head screw in a version that has an optimized hardness profile and a black e-coat that provides a non-metallic, friction-reducing finish for interior/dry-service corrosion resistance.
In the table below, the model numbers of the blue-zinc coated SDHR Combo-Head screws are matched with their alternative, equivalent-sized black e-coat versions. For more information see the black e-coat Strong-Drive SDHR Combo-Head Screw.
| Blue-Zinc Coated Model No. | Equivalent Black E-Coat Model No. |
|---|---|
| SDHR27400 | SDHR10X100 |
| SDHR27400-R25 | SDHR10X100-R25 |
| SDHR27614 | SDHR10X160 |
| SDHR27614-R25 | SDHR10X160-R25 |
| SDHR31400 | SDHR12X100 |
| SDHR31400-R25 | SDHR12X100-R25 |
| SDHR31614 | SDHR12X160 |
| SDHR31614-R25 | SDHR12X160-R25 |
