【25 Pcs 1/4-20 x 1-1/2" Hex Socket Flat Head Cap Screws + 1 Pcs Hex Key Come In a Plastic Storage Box】
✔ Contains 25 Pcs 1/4-20 x 1-1/2" hex socket flat head cap screws
--Meets/exceeds: ANSI/ASME B18.3F
--Thread size ( diameter ): 0.250"/6.36mm
--TPI: 20 teeth per inch
--Total length ( includes head ): 1-1/2" ( 1.500"/38.10mm), thread length: 1.339"/34.01mm
--Screw head style: flat head, known as countersunk head, countersunk angle: 82 ± 2 degree, head diameter: 0.506"/12.84mm, head height: 0.161"/4.09mm
--Screw drive style: hex socket drive, also known as internal hex drive, hex size: 5/32"
--Made of alloy steel 10B21, black oxide finish, high strength and anti-rust
--Strength grade of screws : 10.9 Grade, hardness: HRC 32-39, tensile strength: 1040 N/mm²

✔ Contains 1 Pcs hex key to drive these screws conveniently and easily
--Hex size: 5/32"
--Made of chrome-vanadium steel, nickel plated, higher strength, anti-rust
✔ Easy to store: 25 Pcs hex socket flat head cap screws and 1 Pcs hex key come in a plastic storage box, organized conveniently and easily

[ Package Contains ]
1/4-20 x 1-1/2"-----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