U-Turn - 5/16-18 x 2 1/4 inch Flat Head Floorboard Thread Cutting Screws, Type F, T40 Torx, Black Phosphate (10 Pack)

5/16-18 x 2 1/4 inch Flat Head Floorboard Thread Cutting Screws, Type F, T30 Torx, Black Phosphate (10 Pack) - SOLD BY U-TURN FASTENERS HIGH QUALITY Thread Forming Screws that won't let you down. These Screws require a pre-drilled hole, but they are able to cut their own treads into steel.

• ✔ 𝐏𝐫𝐞𝐦𝐢𝐮𝐦 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥: Crafted from alloy steel with a minimum case hardness steel of RC 45, ensuring durability and longevity. Coated with black phosphate and oil for corrosion resistance, enhancing the lifespan of the screws.
• ✔ 𝐑𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝𝐞𝐝 𝐒𝐩𝐞𝐜𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: Ideal for plate thickness ranging from .247 inches to .253 inches, with a recommended hole size of .228 inches (#1 drill bit size), ensuring proper fit and secure attachment.
• ✔ 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐞𝐝 𝐓𝐡𝐫𝐞𝐚𝐝 𝐂𝐮𝐭𝐭𝐢𝐧𝐠: Threads are designed to be cut into materials with a lower hardness of at least 10-20 Rockwell points for consistent performance and secure fastening.
• ✔ 𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐭 𝐃𝐫𝐢𝐯𝐞 𝐒𝐲𝐬𝐭𝐞𝐦: Equipped with a T-30 Torx drive (6-lobe) for efficient installation, offering better torque transmission and reduced cam-out compared to traditional drive systems.
• ✔ 𝐂𝐮𝐬𝐭𝐨𝐦𝐞𝐫 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧: We stand by the quality, durability, and performance of our flat head floorboard cutting screw. If you have any questions or need assistance, our friendly customer support team is here for you.