✔ Includes 25 Pcs 5/16-18 x 5/8" Hex Socket Flat Head Cap Screws , Thread Size ( Diameter ): 0.312"/7.93mm, TPI: 18 Teeth Per Inch, Total Length ( Including Head ): 5/8" ( 0.625"/15.88mm ), Thread Length: 0.427"/10.85mm, Screw Head Style: Flat Head, Known as Countersunk Head, Countersunk Angle: 82 ± 2 Degree, Head Diameter: 0.628"/15.95mm, HeadHeight: 0.198"/5.03mm; Screw Drive Style: Hex Socket Drive, Known as Internal Hex Drive, Hex Size: 3/16" ✔ Material of Screws: Stainless steel 304, High Strength and Anti-corrosion in Various Conditions ✔ 1 Pcs Hex Key, Hex Size: 3/16", to Drive These Screws Conveniently and Easily ✔ Material of Hex Key: Chrome-Vanadium Steel, Nickel Plated, Higher Strength, Anti-rust ✔ Package: 25 Pcs 5/16-18 x 5/8" Hex Socket Flat Head Cap Screws and 1 Pcs Hex Key Come In Plastic Storage Case, Organized Conveniently and Easily 【25 Pcs 5/16-18 x 5/8" Hex Socket Flat Head Cap Screws + 1 Pcs Hex Key Come In a Plastic Storage Box】

✔ Contains 25 Pcs 5/16-18 x 5/8" hex socket flat head cap screws
--Meets/exceeds: ANSI/ASME B18.3F
--Thread size ( diameter ): 0.312"/7.93mm
--TPI: 18 teeth per inch
--Total length ( includes head ): 5/8" ( 0.625"/15.88mm), thread length: 0.427"/10.85mm
--Screw head style: flat head, known as countersunk head, countersunk angle: 82 ± 2 degree, head diameter: 0.628"/15.95mm, head height: 0.198"/5.03mm
--Screw drive style: hex socket drive, also known as internal hex drive, hex size: 3/16"
--Made of Stainless steel 304, high strength and anti-corrosion in various conditions
✔ Contains 1 Pcs hex key to drive these screws conveniently and easily
--Hex size: 3/16"
--Made of chrome-vanadium steel, nickel plated, higher strength, anti-rust
✔ Easy to store: 25 Pcs 5/16-18 x 5/8" hex socket flat head cap screws and 1 Pcs hex key come in a plastic storage box, organized conveniently and easily

[ Package Contains ]
5/16-18 x 5/8"-----25 Pcs
Hex Key------1 Pcs

[ Hex Socket Drive ]
Hex Socket Drive, also known as Internal hex drive, have a hexagonal hole in the center that requires an Allen key, also known as a hex key or Allen wrench
[ About Flat Head ]
Flat head is similar to standard pan head screws but have a curved top