Self-tapping Wood Screw | ASSY Ecofast

Product Description

The ASSY Ecofast is a partially threaded high strength self-tapping structural wood screw with a countersunk head designed for engineered wood products. The screw design reduces wood splitting while offering a precise setting without the need for pre-drilling.

The ASSY Ecofast screw can be used with both the 90° and 45° wedge washer. Offering Code-approved reliability, the ASSY Ecofast screw has been awarded an ICC-ESR approval in the United States and the Canadian Construction Materials Centre Reports (CCMC) approval in Canada.

Features

Diameters	1/4″ (6 mm), 5/16″ (8 mm), 3/8″ (10 mm)
Lengths	2-1/4″ (60 mm) to 15-3/4” (400 mm)

Versatile countersunk head with milling pockets for a clean architectural finish
Aggressive self-tapping tip bites into the wood and assures quick and easy installation
Partially threaded to pull members together tightly
Equipped with a shank cutter to ease installation
Suitable for ledger board to rim joist connections, and ledger board to stud wall connections
Can be used with both the 90° and 45° wedge washer
Ideal for Cross Laminated Timber (CLT) panel-to-panel connections
For more connection examples and information see our Design Guides
All ASSY fasteners can participate in LEED BD+C 2.0 certification [MRc 4.1 & 4.2, 2 points possible] thanks to the percentage of post-consumer recycled steel used to manufacture them. LEED certification letter is available on request.

The range of available lengths and diameters make the Ecofast suitable for a broad range of projects from log home building to multi-story mass timber construction.

Specifications

Specification	ASSY Ecofast				Thread Length		AW Drive Bit	Packaging Qty.
# Item	Material	Head Type	in.	mm	in.	mm
[3] ECO0660	Hardened Steel	Countersunk Head	1/4" x 2 3/8"	6 x 60	1 1/2"	37	AW 30	200
[3] ECO0670	Hardened Steel	Countersunk Head	1/4" x 2 3/4"	6 x 70	1 5/8"	42	AW 30	200
[3] ECO0680	Hardened Steel	Countersunk Head	1/4" x 3 1/8"	6 x 80	2"	50	AW 30	100
[3] ECO0690	Hardened Steel	Countersunk Head	1/4" x 3 1/2"	6 x 90	2"	50	AW 30	100
[3] ECO06100	Hardened Steel	Countersunk Head	1/4" x 4"	6 x 100	2 3/8"	60	AW 30	100
[3] ECO06120	Hardened Steel	Countersunk Head	1/4" x 4 3/4"	6 x 120	2 3/4"	70	AW 30	100
[3] ECO06140	Hardened Steel	Countersunk Head	1/4" x 5 1/2"	6 x 140	2 3/4"	70	AW 30	100
[3] ECO06160	Hardened Steel	Countersunk Head	1/4" x 6 1/4"	6 x 160	2 3/4"	70	AW 30	100
[3] ECO06180	Hardened Steel	Countersunk Head	1/4" x 7 1/8"	6 x 180	2 3/4"	70	AW 30	100
[3] ECO06200	Hardened Steel	Countersunk Head	1/4" x 7 7/8"	6 x 200	2 3/4"	70	AW 30	100
[3] ECO06220	Hardened Steel	Countersunk Head	1/4" x 8 5/8"	6 x 220	2 3/4"	70	AW 30	100
[3] ECO06240	Hardened Steel	Countersunk Head	1/4" x 9 1/2"	6 x 240	2 3/4"	70	AW 30	100
[3] ECO06260	Hardened Steel	Countersunk Head	1/4" x 10 1/4"	6 x 260	2 3/4"	70	AW 30	100
[3] ECO06280	Hardened Steel	Countersunk Head	1/4" x 11"	6 x 280	2 3/4"	70	AW 30	100
[3] ECO06300	Hardened Steel	Countersunk Head	1/4" x 11 7/8"	6 x 300	2 3/4"	70	AW 30	100
[3] ECO0880	Hardened Steel	Countersunk Head	5/16" x 3 1/8"	8 x 80	2"	50	AW 40	75
[3] ECO0890	Hardened Steel	Countersunk Head	5/16" x 3 1/2"	8 x 90	2 3/8"	60	AW 40	75
[3] ECO08100	Hardened Steel	Countersunk Head	5/16" x 4"	8 x 100	2 3/8"	60	AW 40	75
[3] ECO08120	Hardened Steel	Countersunk Head	5/16" x 4 3/4"	8 x 120	3 1/8"	80	AW 40	75
[3] ECO08140	Hardened Steel	Countersunk Head	5/16" x 5 1/2"	8 x 140	3 1/8"	80	AW 40	75
[3] ECO08160	Hardened Steel	Countersunk Head	5/16" x 6 1/4"	8 x 160	3 1/8"	80	AW 40	75
[3] ECO08180	Hardened Steel	Countersunk Head	5/16" x 7 1/8"	8 x 180	3 1/8"	80	AW 40	75
[3] ECO08200	Hardened Steel	Countersunk Head	5/16" x 7 7/8"	8 x 200	3 1/8"	80	AW 40	75
[3] ECO08220	Hardened Steel	Countersunk Head	5/16" x 8 5/8"	8 x 220	4"	100	AW 40	75
[3] ECO08240	Hardened Steel	Countersunk Head	5/16" x 9 1/2"	8 x 240	4"	100	AW 40	75
[3] ECO08260	Hardened Steel	Countersunk Head	5/16" x 10 1/4"	8 x 260	4"	100	AW 40	75
[3] ECO08280	Hardened Steel	Countersunk Head	5/16" x 11"	8 x 280	4"	100	AW 40	75
[3] ECO08300	Hardened Steel	Countersunk Head	5/16" x 11 7/8"	8 x 300	4"	100	AW 40	75
[3] ECO08320	Hardened Steel	Countersunk Head	5/16" x 12 5/8"	8 x 320	4"	100	AW 40	100
[3] ECO08340	Hardened Steel	Countersunk Head	5/16" x 13 3/8"	8 x 340	4"	100	AW 40	100
[3] ECO08360	Hardened Steel	Countersunk Head	5/16" x 14 1/4"	8 x 360	4"	100	AW 40	100
[3] ECO08380	Hardened Steel	Countersunk Head	5/16" x 15"	8 x 380	4"	100	AW 40	100
[3] ECO08400	Hardened Steel	Countersunk Head	5/16" x 15 3/4"	8 x 400	4"	100	AW 40	100
[3] ECO1080	Hardened Steel	Countersunk Head	3/8" x 3 1/8"	10 x 80	2"	50	AW 50	50
[3] ECO10100	Hardened Steel	Countersunk Head	3/8" x 4"	10 x 100	2 3/8"	60	AW 50	50
[3] ECO10120	Hardened Steel	Countersunk Head	3/8" x 4 3/4"	10 x 120	3 1/8"	80	AW 50	50
[3] ECO10140	Hardened Steel	Countersunk Head	3/8" x 5 1/2"	10 x 140	3 1/8"	80	AW 50	50
[3] ECO10160	Hardened Steel	Countersunk Head	3/8" x 6 1/4"	10 x 160	4"	100	AW 50	50
[3] ECO10180	Hardened Steel	Countersunk Head	3/8" x 7 1/8"	10 x 180	4"	100	AW 50	50
[3] ECO10200	Hardened Steel	Countersunk Head	3/8" x 7 7/8"	10 x 200	4"	100	AW 50	50
[3] ECO10220	Hardened Steel	Countersunk Head	3/8" x 8 5/8"	10 x 220	4"	100	AW 50	50
[3] ECO10240	Hardened Steel	Countersunk Head	3/8" x 9 1/2"	10 x 240	4"	100	AW 50	50
[3] ECO10260	Hardened Steel	Countersunk Head	3/8" x 10 1/4"	10 x 260	4"	100	AW 50	50
[3] ECO10280	Hardened Steel	Countersunk Head	3/8" x 11"	10 x 280	4"	100	AW 50	50
[3] ECO10300	Hardened Steel	Countersunk Head	3/8" x 11 7/8"	10 x 300	4"	100	AW 50	50
[3] ECO10320	Hardened Steel	Countersunk Head	3/8" x 12 5/8"	10 x 320	4 3/4"	120	AW 50	50
[3] ECO10340	Hardened Steel	Countersunk Head	3/8" x 13 3/8"	10 x 340	4 3/4"	120	AW 50	50
[3] ECO10360	Hardened Steel	Countersunk Head	3/8" x 14 1/4"	10 x 360	4 3/4"	120	AW 50	50
[3] ECO10380	Hardened Steel	Countersunk Head	3/8" x 15"	10 x 380	4 3/4"	120	AW 50	50
[3] ECO10400	Hardened Steel	Countersunk Head	3/8" x 15 3/4"	10 x 400	4 3/4"	120	AW 50	50

Product	ASSY Ecofast Diameter	File Extension
ASSY Ecofast	1/4"	6
ASSY Ecofast	5/16"	8
ASSY Ecofast	3/8"	10
All of The Above

Product

ASSY Ecofast Diameter

File Extension

in.

mm.

.DXF

ASSY Ecofast

1/4"

ASSY Ecofast

5/16"

ASSY Ecofast

3/8"

All of The Above

Structural Mass Timber Fastening Design Guide

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ASSY Ecofast

Countersunk Head Partially Threaded Self-Tapping Structural Wood Screw

Countersunk Head

Shank Cutter

Partially Threaded

Counter Thread Tip

Product Description

Features

Specifications

CAD Drawings

Design Guides

Code Approvals

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

CCMC Code Approval 13677-R

ISO 50001 Certification for ASSY Fasteners

LA Research Report (LARR): RR 26073

Installation Instructions

White Papers

Substitution of Lag Screws with Wood Screws

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4D+ Embedment Reduction Factor for Screws Loaded in Withdrawal

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

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Structural Screw Technology in Tall Wood Buildings

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