The screws are using self tapping specially hardened steel screw. W-Cut thread design as zip tip. climatek coated. sharp threads and points to built in washer for interior or exterior use in carrying beams. ledger boards. stair rails. deck posts. playground equipment and other professional applications.
- Brand Name: GRK Fasteners
- Callout Size: No. 20
- Length: 4 in.
- Drive Style: Star
- Material: Steel
- Self Drilling: Yes
- Color: Yellow
- Driver Bit Included: Yes
- Packaging Type: Clamshell
- Indoor or Outdoor: Indoor and Outdoor
- Self Tapping: Yes
- Diameter: 5/16 in.
- Finish: Climacoat
- Number in Package: 100 pk
- Thread Type: W-Cut
- Head Type: Washer Head
- Product Type: Structural Screws
- Discovery – Core. Super.
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