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iExcell 50 Pcs 12.9 Grade M4 x 40 mm Thread Pitch 0.7 mm Alloy Steel Hex Socket Head Cap Screws Kit, Black Oxide Finish
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About IExcell 50 Pcs 12.9 Grade M4 X 40 Mm Thread Pitch
✔ Meets/exceeds: DIN 912, ISO 4762 ✔ Material of Screws: 12.9 Grade Alloy Steel, Black Oxide Finish, High Strength and Anti-rust ✔ Material of Hex Key: chrome-vanadium steel, nickel plated ✔ These screws and hex key come in an easy-use separated girds storage box Sizes--------------Thread Length------Total Length M4 x 40 mm-----------40 mm-------------44 mm Package Contains: M4 x 40 mm--------50 Pcs Hex Key---1 Pcs Total---51 Pcs About Hex Socket Drives: Hex Socket drives, also known as Internal Hex drives, have a hexagonal hole in the center that requires an Allen key, also known as a hex key or Allen wrench About 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
