ASSY SK 4.0

Washer Head Partially Threaded Structural Wood Screws, 4.0
  • Code Approval
  • ICC , ETA
  • Connection Type
  • Wood/Wood, Wood/Steel
  • Applications
  • Timber Framing, Log Home Building, Mass & Heavy Timber Construction
  • Manufacturer
  • SWG

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Washer Head

Partially Threaded

Shank Cutter

Reamer Tip

Product Description

Product Description

The ASSY SK 4.0 are partially threaded high performances structural fasteners. They are ICC-ESR [3179] approved fasteners, designed to pull connection elements tightly together and are recommended when head pull-through is the governing consideration.

Their design offers a precise setting without the need for pre-drilling [may be recommended for long models]. Their blue passivated zinc coating makes them adequate for use in low corrosive environment, such as dry service condition. They 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.

 

Features

Diameters 1/4″ (6 mm), 5/16″ (8 mm), 3/8″ (10 mm)
Lengths 2″ (50 mm)  to  20-1/2” (520 mm)
  • Partially threaded structural fastener 4.0
  • Installed with RW Bits
  • Large washer head
  • Provides tremendous head pull-through capacity
  • Ideal for wood-to-wood & steel-to-wood connections
  • Blue passivated zinc coating
  • Reamer tip providing the fastest fastener wood bite & installation
  • Equipped with a shank cutter reducing the installation torque needed
  • LEED certification letter available upon request
Specifications

Specifications

SpecificationASSY SKThread LengthDrive BitPackaging Qty.
# ItemMaterialHead Typein.mmin.mm
[4] SK0650Hardened SteelWasher Head1/4 x 26 x 501 3/445RW 40100
[4] SK0660Hardened SteelWasher Head1/4 x 2 3/86 x 601 1/237RW 40100
[4] SK0670Hardened SteelWasher Head1/4 x 2 3/46 x 701 5/842RW 40100
[4] SK0680Hardened SteelWasher Head1/4 x 3 1/86 x 80250RW 40100
[4] SK0690Hardened SteelWasher Head1/4 x 3 1/26 x 90250RW 40100
[4] SK06100Hardened SteelWasher Head1/4 x 46 x 1002 3/860RW 40100
[4] SK06120Hardened SteelWasher Head1/4 x 4 3/46 x 1202 3/470RW 40100
[4] SK06140Hardened SteelWasher Head1/4 x 5 1/26 x 1402 3/470RW 40100
[4] SK06160Hardened SteelWasher Head1/4 x 6 1/46 x 1602 3/470RW 40100
[4] SK06180Hardened SteelWasher Head1/4 x 7 1/86 x 1802 3/470RW 40100
[4] SK06200Hardened SteelWasher Head1/4 x 7 7/86 x 2002 3/470RW 40100
[4] SK06220Hardened SteelWasher Head1/4 x 8 5/86 x 2202 3/470RW 40100
[4] SK06240Hardened SteelWasher Head1/4 x 9 1/26 x 2402 3/470RW 40100
[4] SK06260Hardened SteelWasher Head1/4 x 10 1/46 x 2602 3/470RW 40100
[4] SK06280Hardened SteelWasher Head1/4 x 116 x 2802 3/470RW 40100
[4] SK06300Hardened SteelWasher Head1/4 x 11 7/86 x 3002 3/470RW 40100
[4] SK0860Hardened SteelWasher Head5/16 x 2 3/88 x 60250RW 4050
[4] SK0880Hardened SteelWasher Head5/16 x 3 1/88 x 80250RW 4050
[4] SK08100Hardened SteelWasher Head5/16 x 48 x 1002 3/860RW 4050
[4] SK08120Hardened SteelWasher Head5/16 x 4 3/48 x 1203 1/880RW 4050
[4] SK08140Hardened SteelWasher Head5/16 x 5 1/28 x 1403 1/880RW 4050
[4] SK08160Hardened SteelWasher Head5/16 x 6 1/48 x 1603 1/880RW 4050
[4] SK08180Hardened SteelWasher Head5/16 x 7 1/88 x 1803 1/880RW 4050
[4] SK08200Hardened SteelWasher Head5/16 x 7 7/88 x 2003 1/880RW 4050
[4] SK08220Hardened SteelWasher Head5/16 x 8 5/88 x 2204100RW 4050
[4] SK08240Hardened SteelWasher Head5/16 x 9 1/28 x 2404100RW 4050
[4] SK08260Hardened SteelWasher Head5/16 x 10 1/48 x 2604100RW 4050
[4] SK08280Hardened SteelWasher Head5/16 x 118 x 2804100RW 4050
[4] SK08300Hardened SteelWasher Head5/16 x 11 7/88 x 3004100RW 4050
[4] SK08320Hardened SteelWasher Head5/16 x 12 5/88 x 3204100RW 4050
[4] SK08340Hardened SteelWasher Head5/16 x 13 3/88 x 3404100RW 4050
[4] SK08360Hardened SteelWasher Head5/16 x 14 1/48 x 3604100RW 4050
[4] SK08380Hardened SteelWasher Head5/16 x 158 x 3804100RW 4050
[4] SK08400Hardened SteelWasher Head5/16 x 15 3/48 x 4004100RW 4050
[4] SK08420Hardened SteelWasher Head5/16 x 16 1/28 x 4204100RW 4050
[4] SK08440Hardened SteelWasher Head5/16 x 17 1/48 x 4404100RW 4050
[4] SK08480Hardened SteelWasher Head5/16 x 198 x 4804100RW 4025
[4] SK08500Hardened SteelWasher Head5/16 x 19 5/88 x 5004100RW 4025
[4] SK10100Hardened SteelWasher Head3/8 x 410 x 1002 3/860RW 5050
[4] SK10120Hardened SteelWasher Head3/8 x 4 3/410 x 1203 1/880RW 5050
[4] SK10140Hardened SteelWasher Head3/8 x 5 1/210 x 1403 1/880RW 5050
[4] SK10160Hardened SteelWasher Head3/8 x 6 1/410 x 1604100RW 5050
[4] SK10180Hardened SteelWasher Head3/8 x 7 1/810 x 1804100RW 5050
[4] SK10200Hardened SteelWasher Head3/8 x 7 7/810 x 2004100RW 5050
[4] SK10220Hardened SteelWasher Head3/8 x 8 5/810 x 2204100RW 5050
[4] SK10240Hardened SteelWasher Head3/8 x 9 1/210 x 2404100RW 5050
[4] SK10260Hardened SteelWasher Head3/8 x 10 1/410 x 2604100RW 5050
[4] SK10280Hardened SteelWasher Head3/8 x 1110 x 2804100RW 5050
[4] SK10300Hardened SteelWasher Head3/8 x 11 7/810 x 3004100RW 5050
[4] SK10320Hardened SteelWasher Head3/8 x 12 5/810 x 3204 3/4120RW 5050
[4] SK10340Hardened SteelWasher Head3/8 x 13 3/810 x 3404 3/4120RW 5050
[4] SK10360Hardened SteelWasher Head3/8 x 14 1/410 x 3604 3/4120RW 5050
[4] SK10380Hardened SteelWasher Head3/8 x 1510 x 3804 3/4120RW 5050
[4] SK10400Hardened SteelWasher Head3/8 x 15 3/410 x 4004 3/4120RW 5050
[4] SK10460Hardened SteelWasher Head3/8 x 18 1/810 x 4604 3/4120RW 5025
Design Guides

Design Guides

Structural Screw Catalog

A catalog with all information on our ICC & CCMC code-approved fasteners, including dimensions, references & design properties.

Code Approvals

Code Approvals

ICC Code Approval ESR-3179 for Partially Threaded Fasteners - 2022 Edition (October)

ISO 50001 Certification for ASSY Fasteners

White Papers

White Papers

Supplementary Considerations for the Conventional Yield Model

Screw Buckling Values for Compression Perpendicular to Grain Reinforcement

Withdrawal Resistances of ASSY Screws at Various Angles to the Grain

Technical Blogs

Technical Blogs

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