iExcell 50 Pcs M3 x 40/45/50/55/60 mm Stainless Steel 304 Hex Socket Head Cap Screws Bolts Assortment Kit

Meets/Exceeds: DIN 912Screw head style: socket cap; screw drive system: hex socket, also known as internal hex drives, hex size: 2. 5 mmHead diameter: 5. 5 mm; head height: 3 mm; thread pitch: 0. 5 mm; thread diameter: 3 mm M3 x 40mm means : Metric screws, Thread diameter size 3 mm, Thread length 40 mm [ Sizes ] [ Thread Length ] [ Total Length ] M3 x 40mm 40mm/1. 57 43mm/1. 69 M3 x 45mm 45mm/1. 77 48mm/1. 89 M3 x 50mm 50mm/1. 97 53mm/2. 09 M3 x 55mm 55mm/2. 17 58mm/2. 28 M3 x 60mm 60mm/2. 36 63mm/2. 48 Package Contains: M3 x 40mm 10 Pcs M3 x 45mm 10 Pcs M3 x 50mm 10 Pcs M3 x 55mm 10 Pcs M3 x 60mm 10 Pcs Hex Key 1 Pcs Total: 51 Pcs About Hex Socket Drives: u2003Hex 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:u2003Socket 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.