Product Description
The ASSY VG CSK (Countersunk Head) screw is a fully threaded timber connector suitable for timber reinforcement, wood-to-wood connections, and steel-to-wood connections. The ASSY VG CSK can be used with both the 90° and 45° wedge washer.
Code-approved reliability, the ASSY VG CSK screw has been awarded an ICC-ESR approval in the United States and the Canadian Construction Materials Centre Reports (CCMC) approval in Canada.
| Diameters | 5/16″ (8 mm) , 3/8″ (10 mm) , 1/2″ (12 mm) |
| Lengths | 3-1/8″ (80 mm) to 31-1/2” (800 mm) |
The range of available lengths and diameters makes the ASSY VG CSK suitable for a broad range of projects from log home building to multi-story mass timber construction. The ASSY VG CSK screw can also be used in beam upgrades and steel-to-wood connections. ASSY fully threaded screws can be used in typical reinforcing applications, including checked or cracked members, potentially restoring them to nearly their full original strength following ourTimber Reinforcement Guide.
Specifications 
| Specification | ASSY VG CSK | Thread Length | AW Drive Bit | Packaging Qty. | ||||
|---|---|---|---|---|---|---|---|---|
| # Item | Material | Head Type | in. | mm | in. | mm | ||
| CSK0880 | Hardened Steel | Countersunk Head | 5/16" x 3 1/8" | 8 x 80 | 2 1/2" | 61 | AW 40 | 75 |
| CSK08120 | Hardened Steel | Countersunk Head | 5/16" x 4 3/4" | 8 x 120 | 4" | 103 | AW 40 | 75 |
| CSK08140 | Hardened Steel | Countersunk Head | 5/16" x 5 1/2" | 8 x 140 | 4 7/8" | 123 | AW 40 | 75 |
| CSK08160 | Hardened Steel | Countersunk Head | 5/16" x 6 1/4" | 8 x 160 | 5 5/8" | 143 | AW 40 | 75 |
| CSK08180 | Hardened Steel | Countersunk Head | 5/16" x 7 1/8" | 8 x 180 | 6 3/8" | 163 | AW 40 | 75 |
| CSK08200 | Hardened Steel | Countersunk Head | 5/16" x 7 7/8" | 8 x 200 | 7 1/4" | 183 | AW 40 | 75 |
| CSK08220 | Hardened Steel | Countersunk Head | 5/16" x 8 5/8" | 8 x 220 | 8" | 203 | AW 40 | 75 |
| CSK08240 | Hardened Steel | Countersunk Head | 5/16" x 9 1/2" | 8 x 240 | 8 3/4" | 223 | AW 40 | 75 |
| CSK08260 | Hardened Steel | Countersunk Head | 5/16" x 10 1/4" | 8 x 260 | 9 5/8" | 243 | AW 40 | 75 |
| CSK08280 | Hardened Steel | Countersunk Head | 5/16" x 11" | 8 x 280 | 10 3/8" | 263 | AW 40 | 75 |
| CSK08300 | Hardened Steel | Countersunk Head | 5/16" x 11 7/8" | 8 x 300 | 11 1/8" | 283 | AW 40 | 75 |
| CSK10100 | Hardened Steel | Countersunk Head | 3/8" x 4" | 10 x 100 | 3" | 77 | AW 50 | 50 |
| CSK10140 | Hardened Steel | Countersunk Head | 3/8" x 5 1/2" | 10 x 140 | 4 7/8" | 125 | AW 50 | 50 |
| CSK10160 | Hardened Steel | Countersunk Head | 3/8" x 6 1/4" | 10 x 160 | 5 3/4" | 145 | AW 50 | 50 |
| CSK10180 | Hardened Steel | Countersunk Head | 3/8" x 7 1/8" | 10 x 180 | 6 1/2" | 165 | AW 50 | 50 |
| CSK10200 | Hardened Steel | Countersunk Head | 3/8" x 7 7/8" | 10 x 200 | 7 1/4" | 185 | AW 50 | 50 |
| CSK10220 | Hardened Steel | Countersunk Head | 3/8" x 8 5/8" | 10 x 220 | 8 1/8" | 205 | AW 50 | 50 |
| CSK10240 | Hardened Steel | Countersunk Head | 3/8" x 9 1/2" | 10 x 240 | 8 7/8" | 225 | AW 50 | 50 |
| CSK10260 | Hardened Steel | Countersunk Head | 3/8" x 10 1/4" | 10 x 260 | 9 5/8" | 245 | AW 50 | 50 |
| CSK10280 | Hardened Steel | Countersunk Head | 3/8" x 11" | 10 x 280 | 10 3/8" | 265 | AW 50 | 50 |
| CSK10300 | Hardened Steel | Countersunk Head | 3/8" x 11 7/8" | 10 x 300 | 11 1/4" | 285 | AW 50 | 50 |
| CSK10320 | Hardened Steel | Countersunk Head | 3/8" x 12 5/8" | 10 x 320 | 12" | 305 | AW 50 | 50 |
| CSK10340 | Hardened Steel | Countersunk Head | 3/8" x 13 3/8" | 10 x 340 | 12 3/4" | 325 | AW 50 | 50 |
| CSK10360 | Hardened Steel | Countersunk Head | 3/8" x 14 1/4" | 10 x 360 | 13 5/8" | 345 | AW 50 | 50 |
| CSK10380 | Hardened Steel | Countersunk Head | 3/8" x 15" | 10 x 380 | 14 3/8" | 365 | AW 50 | 50 |
| CSK10400 | Hardened Steel | Countersunk Head | 3/8" x 15 3/4" | 10 x 400 | 15 1/8" | 385 | AW 50 | 50 |
| CSK10430 | Hardened Steel | Countersunk Head | 3/8" x 16 7/8" | 10 x 430 | 16 3/8" | 415 | AW 50 | 25 |
| CSK10480 | Hardened Steel | Countersunk Head | 3/8" x 19" | 10 x 480 | 18 1/4" | 465 | AW 50 | 25 |
| CSK10530 | Hardened Steel | Countersunk Head | 3/8" x 20 7/8" | 10 x 530 | 20 1/8" | 512 | AW 50 | 25 |
| CSK10580 | Hardened Steel | Countersunk Head | 3/8" x 22 7/8" | 10 x 580 | 22 1/8" | 562 | AW 50 | 25 |
| CSK10650 | Hardened Steel | Countersunk Head | 3/8" x 25 5/8" | 10 x 650 | 24 7/8" | 632 | AW 50 | 25 |
| CSK10700 | Hardened Steel | Countersunk Head | 3/8" x 27 5/8" | 10 x 700 | 26 7/8" | 682 | AW 50 | 25 |
| CSK10750 | Hardened Steel | Countersunk Head | 3/8" x 29 1/2" | 10 x 750 | 28 7/8" | 732 | AW 50 | 25 |
| CSK10800 | Hardened Steel | Countersunk Head | 3/8" x 31 1/2" | 10 x 800 | 30 3/4" | 782 | AW 50 | 25 |
| CSK12120 | Hardened Steel | Countersunk Head | 1/2" x 4 3/4" | 12 x 120 | 4 1/8" | 105 | AW 50 | 50 |
| CSK12140 | Hardened Steel | Countersunk Head | 1/2" x 5 1/2" | 12 x 140 | 4 7/8" | 125 | AW 50 | 50 |
| CSK12160 | Hardened Steel | Countersunk Head | 1/2" x 6 1/4" | 12 x 160 | 5 3/4" | 145 | AW 50 | 50 |
| CSK12180 | Hardened Steel | Countersunk Head | 1/2" x 7 1/8" | 12 x 180 | 6 1/2" | 165 | AW 50 | 50 |
| CSK12200 | Hardened Steel | Countersunk Head | 1/2" x 7 7/8" | 12 x 200 | 7 1/4" | 185 | AW 50 | 50 |
| CSK12220 | Hardened Steel | Countersunk Head | 1/2" x 8 5/8" | 12 x 220 | 8 1/8" | 205 | AW 50 | 50 |
| CSK12240 | Hardened Steel | Countersunk Head | 1/2" x 9 1/2" | 12 x 240 | 8 7/8" | 225 | AW 50 | 50 |
| CSK12260 | Hardened Steel | Countersunk Head | 1/2" x 10 1/4" | 12 x 260 | 9 5/8" | 245 | AW 50 | 50 |
| CSK12280 | Hardened Steel | Countersunk Head | 1/2" x 11" | 12 x 280 | 10 3/8" | 265 | AW 50 | 50 |
| CSK12300 | Hardened Steel | Countersunk Head | 1/2" x 11 7/8" | 12 x 300 | 11 1/4" | 285 | AW 50 | 50 |
| CSK12380 | Hardened Steel | Countersunk Head | 1/2" x 15" | 12 x 380 | 14 3/8" | 365 | AW 50 | 50 |
| CSK12480 | Hardened Steel | Countersunk Head | 1/2" x 19" | 12 x 480 | 18 1/4" | 465 | AW 50 | 25 |
| CSK12600 | Hardened Steel | Countersunk Head | 1/2" x 23 5/8" | 12 x 600 | 23" | 585 | 25 | |
CAD Drawings
Design Guides
The most complete tool for high-capacity mass timber connections design using ICC and CCMC code approved ASSY structural fasteners.
Companion to the Structural Screws Design Guide, it provides pre-designed, easy-to-read tables for tens of mass timber connections using high-capacity ASSY self-tapping screws.
Code Approvals
Installation Instructions
The structural fasteners installation guide is a practical document designed to simplify the installation process of ASSY self-tapping screws.
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