iexcell 25 Pcs 1/4-20 x 1 Alloy Steel 10.9 Grade Hex Socket Flat Head Cap Screws Bolts Kit, Black Oxide Finish

【25 Pcs 1/4-20 x 1" Hex Socket Flat Head Cap Screws + 1 Pcs Hex Key Come In a Plastic Storage Box】 ✔ Contains 25 Pcs 1/4-20 x 1" 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" ( 25.40mm), thread length: 0.839"/21.31mm --Screw head style: flat head, known as countersunk head, countersunk angle: 82 ± 2 degree, head diameter: 0.506"/12.85mm, 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 1/4-20 x 1" 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"-----25 Pcs Hex Key------1 Pcs [ What is 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 [ What is Flat Head ] Flat head is similar to standard pan head screws but have a curved top