iexcell 50 Pcs M3 x 75mm Partially Threaded Thread Pitch 0.5 mm Alloy Steel 12.9 Grade Hex Socket Head Cap Screws Bolts Kit, Black Oxide Finish

【50 Pcs M3 x 75mm Hex Socket Head Cap Screws + 1 Pcs Hex Key Come In a Plastic Storage Box】 ✔ Contains 50 Pcs M3 x 75mm hex socket head cap screws --Meets/exceeds: DIN912 --Thread size ( diameter ): 3 mm --Thread Pitch: 0.5 mm --Partially Threaded, Thread Length: 20 mm , Total Length (includes non-threaded part and head): 77.93 mm ( Range: 77.93 ± 0.67 mm ) --Screw head style: socket cap head, head diameter: 5.50 mm ( Range: 5.50 ± 0.15 mm), Head Height: 2.93 mm ( Range: 2.93 ± 0.07 mm) --Screw drive style: hex socket drive, also known as internal hex drive, hex size: 2.5 mm --Made of alloy steel 40Cr, black oxide finish, high strength and anti-rust --Strength grade of screws : 12.9 Grade, hardness: HRC 39-44, tensile strength: 1220 N/mm² ✔ Contains 1 Pcs hex key to drive these screws conveniently and easily --Hex size: 2.5 mm --Made of chrome-vanadium steel, nickel plated, higher strength, anti-rust ✔ Easy to store: these 50 Pcs M3 x 75mm hex socket head cap screws and 1 Pcs Hex Key come in a plastic storage box, organized conveniently and easily [ Package Contains ] M3 x 75mm-----50 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 Socket Cap Head ] Socket Cap Head , also known as Allen head, have a recessed drive, and are commonly used when there is not enough clearance for a conventional wrench or socket. They are fastened with an Allen wrench, which is also called a hex wrench or hex key