3/8-16 x 1 3/4 Grade 8 Hex Cap Screw Plain Domestic USA (100)

5/8-18 x 7 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (25)

7/8-14 x 1 3/4 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (15)

1/4-20 x 1 3/4 Grade 8 Hex Cap Screw Plain Domestic USA (100)

they have a head size of 1/4" and a length of 2 3/4"

#9 x 2 1/2 Simpson Strong-Drive® WSV SUBFLOOR Screw T25 6-Lobe (Collated) - Box (750) M24-3.00 Socket Set Screws Cup Point DIN 916 Black Oxide 3/8-16 x 1 3/4 GradeThese #9 x 2 1 2 Simpson Strong Drive WSV SUBFLOOR screws offer exceptional strength and fast drive time with their 6 Lobe T25 drive. Their collated design helps speed up installation and each box contains 750 screws.