iExcell 525 Pcs M3 x 20253035404550mm Stainless Steel 304 Hex Socket Head Cap Screws Bolts Nuts Washers Assortment Kit

? Meets/Exceeds: DIN 912, DIN934 ? Screw head style: socket cap; screw drive system: hex socket, also known as internal hex drives, hex size: 2.5 mm ? Head diameter: 5.5 mm; head height: 3 mm; thread pitch: 0.5 mm; thread diameter: 3 mm ? Package: all these screws, nuts, washers and hex key packed In a sturdy easy-use plastic storage box, organized conveniently and easily ? M3 x 20mm means: Metric Screws, Thread Diameter 3mm, Thread Legnth: 20 mm [ Sizes ]--------[ Thread Length ]----[ Total Length ] M3 x 20mm------20mm/0.79"-------23mm/0.90" M3 x 25mm------25mm/0.98"-------28mm/1.10" M3 x 30mm------30mm/1.18"-------33mm/1.30" M3 x 35mm------35mm/1.38"-------38mm/1.50" 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" Package Contains: M3 x 20mm------25 Pcs M3 x 25mm------25 Pcs M3 x 30mm------25 Pcs M3 x 35mm------25 Pcs M3 x 40mm------25 Pcs M3 x 45mm------25 Pcs M3 x 50mm------25 Pcs M3 Nuts---------175 Pcs M3 Washers-----175 Pcs Hex Key -----1 Pcs Total: 526 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