ASSY A2 Kombi

Hexagonal Head, Stainless Steel Self-Tapping Wood Screw
  • Code Approval
  • ICC, ETA
  • Connection Type
  • Wood/Steel
  • Applications
  • Timber Framing, Log Home Building,
    Mass & Heavy Timber Construction
  • Manufacturer
  • SWG

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Countersunk Head

Ring Thread Tip

Corrosion Ressitant


Product Description

Product Description

The ASSY A2 Stainless Steel Kombi screw is an engineered structural wood screw that is corrosion resistant and self-tapping. The screw design also reduces wood splitting while offering a precise setting without the need for pre-drilling. Code-approved reliability, the ASSY A2 Kombi has been awarded an ICC-ESR approval in the United States.



Diameters5/16″ (8 mm) , 3/8″ (10 mm)
Lengths3-1/8” (80 mm)  to  7-7/8” (200 mm)
  • Corrosion-free
  • Regular hex head
  • Ring thread tip reduces wood splitting and promotes precise setting
  • Designed for high-performance exposed steel-to-wood connections
  • May replace lag bolt
  • Installation with AW bits or metric Hex head socket

The hex head is engineered for installation using either a socket or a bit for multipurpose applications. The reinforced and tapered shoulder below the screw head ensures a tight fit in pre-drilled steel plate holes. The tapered shape enables the screw to self-center. The ASSY A2 Kombi screw is equipped with a regular hex head, in order to achieve the best steel-to-wood connections. When used in wood-to-wood connections, the ASSY A2 Kombi screw can also be driven with a regular AW 40 Bit.



SpecificationASSY A2 KombiThread LengthAW Drive BitPackaging Qty.
# ItemMaterialHead
A2KPT0880Stainless SteelHexagonal Head5/16" x 3 1/8"8 x 802"50AW 4075
A2KPT08100Stainless SteelHexagonal Head5/16" x 4"8 x 1002 3/8"60AW 4075
A2KPT08120Stainless SteelHexagonal Head5/16" x 4 3/4"8 x 1203 1/8"80AW 4075
A2KPT08140Stainless SteelHexagonal Head5/16" x 5 1/2"8 x 1403 1/8"80AW 4075
A2KPT08160Stainless SteelHexagonal Head5/16" x 6 1/4"8 x 1603 1/8"80AW 4075
A2KPT08180Stainless SteelHexagonal Head5/16" x 7 1/8"8 x 1803 1/8"80AW 4075
A2KPT08200Stainless SteelHexagonal Head5/16" x 7 7/8"8 x 2003 1/8"80AW 4075
A2KPT10100Stainless SteelHexagonal Head3/8" x 4"10 x 1002 3/8"60AW 4050
A2KPT10120Stainless SteelHexagonal Head3/8" x 4 3/4"10 x 1203 1/8"80AW 4050
A2KPT10140Stainless SteelHexagonal Head3/8" x 5 1/2"10 x 1403 1/8"80AW 4050
A2KPT10160Stainless SteelHexagonal Head3/8" x 6 1/4"10 x 1603 1/8"80AW 4050
A2KPT10180Stainless SteelHexagonal Head3/8" x 7 1/8"10 x 1803 1/8"80AW 4050
A2KPT10200Stainless SteelHexagonal Head3/8" x 7 7/8"10 x 2003 1/8"80AW 4050
CAD Drawings

CAD Drawings

ProductASSY A2 Kombi DiameterFile Extension
ASSY A2 Kombi5/16"8
Design Guides

Design Guides

Structural Screw Design Guide

The most complete tool for high-capacity mass timber connections design using ICC and CCMC code approved ASSY structural fasteners.

Structural Mass Timber Fastening Design Guide

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

Code Approvals

ICC Code Approval ESR-3179 for Partially Threaded Fasteners - 2021 Edition (August)

ISO 50001 Certification for ASSY Fasteners

LA Research Report (LARR): RR 26073

Installation Instructions

Installation Instructions

Structural Fasteners Installation Guide

The structural fasteners installation guide is a practical document designed to simplify the installation process of ASSY self-tapping screws.

White Papers

White Papers

Timber Moisture Content Changes and Associated Stress Predictions on Structural Wood Screws

Substitution of Lag Screws with Wood Screws

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