✔ Includes 100 Pcs #4-40 x 3/8" Hex Socket Button Head Cap Screws , Thread Size ( Diameter ): 0.108"/2.75mm, TPI: 40 Teeth Per Inch, Thread Length: 3/8" ( 0.375"/9.53mm ), Total Length ( Including Head ): 0.43"/10.92mm, Screw Head Style: Button Head, Head Diameter: 0.207"/5.26mm, Head Height: 0.055"/1.40mm; Screw Drive Style: Hex Socket Drive, Known as Internal Hex Drive, Hex Size: 1/16" ✔ Material of Screws: Stainless steel 304, High Strength and Anti-corrosion in Various Conditions ✔ 1 Pcs Hex Key, Hex Size: 1/16", to Drive These Screws Conveniently and Easily ✔ Material of Hex Key: Chrome-Vanadium Steel, Nickel Plated, Higher Strength, Anti-rust ✔ Package: 100 Pcs #4-40 x 3/8" Hex Socket Button Head Cap Screws and 1 Pcs Hex Key Come In Plastic Storage Case, Organized Conveniently and Easily 【100 Pcs #4-40 x 3/8" Hex Socket Button Head Cap Screws + 1 Pcs Hex Key Come In a Plastic Storage Box】

✔ Contains 100 Pcs #4-40 x 3/8" hex socket button head cap screws
--Meets/exceeds: ANSI/ASME B18.3BT
--Thread size ( diameter ): 0.108"/2.75mm
--TPI: 40 teeth per inch
--Thread length: 3/8" ( 0.375"/9.53mm ), total length ( includes head ) 0.43"/10.92mm
--Screw head style: button head, head diameter: 0.207"/5.26mm, head height 0.055"/1.40mm
--Screw drive style: hex socket drive, also known as internal hex drive, hex size: 1/16"
--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: 1/16"
--Made of chrome-vanadium steel, nickel plated, higher strength, anti-rust

✔ Easy to store: 100 Pcs #4-40 x 3/8" hex socket button head cap screws and 1 Pcs hex key come in a plastic storage box, organized conveniently and easily

[ Package Contains ]
#4-40 x 3/8"-----100 Pcs
Hex Key------1 Pcs

[ About 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 Button Head ]
Button head is similar to standard pan head screws but have a curved top