Product Description
The ASSY VG Cyl (Cylinder Head) screw is a fully threaded self-tapping wood screw engineered for timber reinforcement, beam repair, and connections where a small head is required for a clean, concealed, architectural finish.
Code-approved reliability, the ASSY VG Cyl screw has been awarded an ICC-ESR approval in the United States and the Canadian Construction Materials Centre Reports (CCMC) approval in Canada.
| Diameters | 1/4″ (6 mm) , 5/16″ (8 mm) , 3/8″ (10 mm) |
| Lengths | 3-1/8″ (80 mm) to 31-1/2” (800 mm) |
The range of available lengths and diameters makeS the ASSY VG Cyl suitable for a broad range of projects from log home building to multi-story mass timber construction. The ASSY VG Cyl screw can also be used in beam upgrades and connections where a small screw head is required. 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 our Timber Reinforcement Guide.
Specifications 
| Specification | ASSY VG CYL | Thread Length | AW Drive Bit | Packaging Qty. | ||||
|---|---|---|---|---|---|---|---|---|
| # Item | Material | Head Type | in. | mm | in. | mm | ||
| CYL0680 | Hardened Steel | Cylinder Head | 1/4" x 3 1/8" | 6 x 80 | 2 7/8" | 73 | AW 30 | 100 |
| CYL06100 | Hardened Steel | Cylinder Head | 1/4" x 4" | 6 x 100 | 3 5/8" | 93 | AW 30 | 100 |
| CYL06120 | Hardened Steel | Cylinder Head | 1/4" x 4 3/4" | 6 x 120 | 4 1/2" | 113 | AW 30 | 100 |
| CYL06140 | Hardened Steel | Cylinder Head | 1/4" x 5 1/2" | 6 x 140 | 5 1/4" | 133 | AW 30 | 100 |
| CYL06160 | Hardened Steel | Cylinder Head | 1/4" x 6 1/4" | 6 x 160 | 6" | 153 | AW 30 | 100 |
| CYL06180 | Hardened Steel | Cylinder Head | 1/4" x 7 1/8" | 6 x 180 | 6 3/4" | 173 | AW 30 | 100 |
| CYL06200 | Hardened Steel | Cylinder Head | 1/4" x 7 7/8" | 6 x 200 | 7 5/8" | 193 | AW 30 | 100 |
| CYL08120 | Hardened Steel | Cylinder Head | 5/16" x 4 3/4" | 8 x 120 | 4" | 104 | AW 40 | 50 |
| CYL08140 | Hardened Steel | Cylinder Head | 5/16" x 5 1/2" | 8 x 140 | 4 7/8" | 124 | AW 40 | 50 |
| CYL08160 | Hardened Steel | Cylinder Head | 5/16" x 6 1/4" | 8 x 160 | 5 5/8" | 144 | AW 40 | 50 |
| CYL08180 | Hardened Steel | Cylinder Head | 5/16" x 7 1/8" | 8 x 180 | 6 1/2" | 164 | AW 40 | 50 |
| CYL08200 | Hardened Steel | Cylinder Head | 5/16" x 7 7/8" | 8 x 200 | 7 1/4" | 184 | AW 40 | 75 |
| CYL08220 | Hardened Steel | Cylinder Head | 5/16" x 8 5/8" | 8 x 220 | 8" | 204 | AW 40 | 75 |
| CYL08240 | Hardened Steel | Cylinder Head | 5/16" x 9 1/2" | 8 x 240 | 8 7/8" | 224 | AW 40 | 75 |
| CYL08260 | Hardened Steel | Cylinder Head | 5/16" x 10 1/4" | 8 x 260 | 9 5/8" | 244 | AW 40 | 75 |
| CYL08280 | Hardened Steel | Cylinder Head | 5/16" x 11" | 8 x 280 | 10 3/8" | 264 | AW 40 | 75 |
| CYL08300 | Hardened Steel | Cylinder Head | 5/16" x 11 7/8" | 8 x 300 | 11 1/8" | 284 | AW 40 | 75 |
| CYL08330 | Hardened Steel | Cylinder Head | 5/16" x 13" | 8 x 330 | 12 3/8" | 314 | AW 40 | 50 |
| CYL08360 | Hardened Steel | Cylinder Head | 5/16" x 14 1/4" | 8 x 360 | 13 1/2" | 344 | AW 40 | 50 |
| CYL08380 | Hardened Steel | Cylinder Head | 5/16" x 15" | 8 x 380 | 14 3/8" | 364 | AW 40 | 50 |
| CYL08430 | Hardened Steel | Cylinder Head | 5/16" x 17" | 8 x 430 | 16 1/4" | 414 | AW 40 | 25 |
| CYL08480 | Hardened Steel | Cylinder Head | 5/16" x 19" | 8 x 480 | 18 1/4" | 464 | AW 40 | 25 |
| CYL08530 | Hardened Steel | Cylinder Head | 5/16" x 20 7/8" | 8 x 530 | 20 1/4" | 514 | AW 40 | 25 |
| CYL08580 | Hardened Steel | Cylinder Head | 5/16" x 22 7/8" | 8 x 580 | 22 1/4" | 564 | AW 40 | 25 |
| CYL10120 | Hardened Steel | Cylinder Head | 3/8" x 4 3/4" | 10 x 120 | 4 1/8" | 105 | AW 50 | 50 |
| CYL10140 | Hardened Steel | Cylinder Head | 3/8" x 5 1/2" | 10 x 140 | 4 7/8" | 125 | AW 50 | 50 |
| CYL10160 | Hardened Steel | Cylinder Head | 3/8" x 6 1/4" | 10 x 160 | 5 3/4" | 145 | AW 50 | 50 |
| CYL10180 | Hardened Steel | Cylinder Head | 3/8" x 7 1/8" | 10 x 180 | 6 1/2" | 165 | AW 50 | 50 |
| CYL10200 | Hardened Steel | Cylinder Head | 3/8" x 7 7/8" | 10 x 200 | 7 1/4" | 185 | AW 50 | 50 |
| CYL10220 | Hardened Steel | Cylinder Head | 3/8" x 8 5/8" | 10 x 220 | 8 1/8" | 205 | AW 50 | 50 |
| CYL10240 | Hardened Steel | Cylinder Head | 3/8" x 9 1/2" | 10 x 240 | 8 7/8" | 225 | AW 50 | 50 |
| CYL10260 | Hardened Steel | Cylinder Head | 3/8" x 10 1/4" | 10 x 260 | 9 5/8" | 245 | AW 50 | 50 |
| CYL10280 | Hardened Steel | Cylinder Head | 3/8" x 11" | 10 x 280 | 10 3/8" | 265 | AW 50 | 50 |
| CYL10300 | Hardened Steel | Cylinder Head | 3/8" x 11 7/8" | 10 x 300 | 11 1/4" | 285 | AW 50 | 50 |
| CYL10320 | Hardened Steel | Cylinder Head | 3/8" x 12 5/8" | 10 x 320 | 12" | 305 | AW 50 | 50 |
| CYL10340 | Hardened Steel | Cylinder Head | 3/8" x 13 3/8" | 10 x 340 | 12 3/4" | 325 | AW 50 | 50 |
| CYL10360 | Hardened Steel | Cylinder Head | 3/8" x 14 1/4" | 10 x 360 | 13 5/8" | 345 | AW 50 | 50 |
| CYL10380 | Hardened Steel | Cylinder Head | 3/8" x 15" | 10 x 380 | 14 3/8" | 365 | AW 50 | 50 |
| CYL10400 | Hardened Steel | Cylinder Head | 3/8" x 15 3/4" | 10 x 400 | 15 1/8" | 385 | AW 50 | 50 |
| CYL10430 | Hardened Steel | Cylinder Head | 3/8" x 17" | 10 x 430 | 16 3/8" | 415 | AW 50 | 25 |
| CYL10480 | Hardened Steel | Cylinder Head | 3/8" x 19" | 10 x 480 | 18" | 456 | AW 50 | 25 |
| CYL10530 | Hardened Steel | Cylinder Head | 3/8" x 20 7/8" | 10 x 530 | 19 7/8" | 506 | AW 50 | 25 |
| CYL10580 | Hardened Steel | Cylinder Head | 3/8" x 22 7/8" | 10 x 580 | 21 7/8" | 556 | AW 50 | 25 |
| CYL10650 | Hardened Steel | Cylinder Head | 3/8" x 25 5/8" | 10 x 650 | 24 5/8" | 626 | AW 50 | 25 |
| CYL10700 | Hardened Steel | Cylinder Head | 3/8" x 27 5/8" | 10 x 700 | 26 5/8" | 676 | AW 50 | 25 |
| CYL10750 | Hardened Steel | Cylinder Head | 3/8" x 29 1/2" | 10 x 750 | 28 5/8" | 726 | AW 50 | 25 |
| CYL10800 | Hardened Steel | Cylinder Head | 3/8" x 31 1/2" | 10 x 800 | 30 1/2" | 776 | AW 50 | 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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