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iexcell 50 Pcs M4 x 20/25/30/35/40 Alloy Steel 12.9 Grade Hex Socket Head Cap Screws Bolts Assortment Kit, Black Oxide Finish
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About Iexcell 50 Pcs M4 X 20/25/30/35/40 Alloy Steel 12.9
✔ Meets/exceeds: DIN 912 ✔ Screw Head Style: Socket Cap, Head Diameter 7.2 mm, Head Height 4.0 mm; Screw Drive Style: Internal Hex Drives, Known as Hex Socket Drives, Hex Size: 3.0 mm ✔ Material of Screws: Alloy Steel 40Cr, Black Oxide Finish; Strength Grade of Screws: 12.9 Grade, Hardness: HRC 39-44, Tensile Strength: 1220N/mm² ✔ Material of hex key: chrome-vanadium steel, nickel plated, higher strength and anti-rust ✔ Rust proof of screws: black oxide finish with anti-rust oil ✔ Easy to store: these screws and hex key come in an easy-use storage case [ Sizes ]-----[ Thread Length ]-----[ Total Length ] M4 x 20 ------ 20 mm/0.79"------- 24 mm/0.94" M4 x 25 ------ 25 mm/0.98"------- 29 mm/1.14" M4 x 30 ------ 30 mm/1.18"------- 34 mm/1.34" M4 x 35 ------ 35 mm/1.38"------- 39 mm/1.54" M4 x 40 ------ 40 mm/1.57"------- 44 mm/1.73" [ Package Contains ] M4 x 20------10 Pcs M4 x 25------10 Pcs M4 x 30------10 Pcs M4 x 35------10 Pcs M4 x 40------10 Pcs Hex Key -----1Pcs [ About Internal Hex drives ] Internal Hex drives, also known as Hex Socket 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
