iExcell 50 Pcs Stainless Steel 304 M4 x 16/18/20/25/30 mm Hex Socket Button Head Cap Screws Bolts Assortment Kit

• ✔ Screw Head Style: Button; Screw Drive Style: Hex Socket, Hex Size 2.5 mm
• ✔ Head Diameter : 7.4mm; Head Height: 2mm; Thread Size( Dia. ):4 mm;Thread Pitch :0.7 mm
• ✔ 5 Sizes: M4 x 16mm M4 x 18mm M4 x 20mm M4 x 25mm M4 x 30mm
• ✔ Includes 1 Pcs Hex Key Wrench, Hex Size 2.5 mm, to Drives These Screws Easily
• ✔ Package : 50 Pcs M4 Hex Socket Button Head Cap Screws and 1 Pcs Hex Key Wrench, Come in an Easy-use Storage Box

✔  Meets/exceeds: ISO7380 ✔  Material of Screws: Stainless steel 304, high strength and anti-corrosion in various environments ✔  Material of Hex Key Wrench: chrome-vanadium steel, nickel plated ✔  Easy to store : these screws and hex key wrench come in an easy-use separated girds storage box [ Sizes ]---[ Thread Length ]-----[ Total Length ] M4 x 20 ---------20mm/0.79" ---------22mm/0.87" M4 x 25 ---------25mm/0.98" ---------27mm/1.06" M4 x 30 ---------30mm/1.18" ---------32mm/1.26" M4 x 35 ---------35mm/1.38" ---------37mm/1.47" M4 x 40 ---------40mm/1.58" ---------42mm/1.65" Package Contains: M4 x 16 ---------10 Pcs M4 x 18 ---------10 Pcs M4 x 20 ---------10 Pcs M4 x 25 ---------10 Pcs M4 x 30 ---------10 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 Button Head Button head screws are similar to standard pan head screws, but have a curved top