the T20 thread is designed to hold more securely and last longer than other screws

3/4-10 x 6 1/2 Hex Cap Screw SS 316 (A4)

3/4-10 x 9 A307A Hex Bolt Plain Steel

with a plain finish

22 x 8 Simpson Strong-Drive® SDWS Structural Wood to Wood Timber Screw - Pack (12)

1/2-13 x 8 1/2 STRONG-BOLT® 2 Cracked and Uncracked Concrete Wedge Anchor 304 Stainless Steel (25) 1-8 L9 Hex Cap Screws Yellow Zinc Plated - Domestic USA the T20 thread is designed1 2 13 x 8 1 2 STRONG BOLT 2 Cracked and Uncracked Concrete Wedge Anchor 304 Stainless Steel (25) Category 1 anchor classification: The Strong Bolt 2 anchor received classification as a Category 1 anchor, which is established by performance in reliability tests in accordance with AC193 and ACI355. 2 test criteria. Category 1 is the highest attainable anchor category for reliability. Tri segmented clip: Each segment adjusts independently, increasing