[M2 x 4  & 6  & 8  & 10  & 12]

[M3 x 20  & 25  & 30  & 35]

[M4 x 30  & 35  & 40  & 45  & 50]

[M3 x 20  & 25  & 30  & 35  & 40]

[M5 x 8  & 10  & 12  & 16  & 20]

[M5 x 40  & 45  & 50  & 55  & 60]

[M5 x 20  & 25  & 30  & 35  & 40]

[M4 x 40  & 45  & 50  & 55  & 60]

[M3 x 4  & 5  & 6  & 8  & 10  & 12  & 14  & 16  & 20  & 25  & 30]

[M3 x 6  & 8  & 10  & 12  & 16]

[M6 x 35  & 40  & 45  & 50  & 55]

[M8 x 30  & 35  & 40  & 45  & 50]

[M6 x 20  & 25  & 30  & 35  & 40]

[M4 x 20  & 25  & 30  & 35  & 40]

[M5 x 60  & 65  & 70  & 75  & 80]

[M4 x 8  & 10  & 12  & 14  & 16]

[M4 x 60  & 65  & 70  & 75  & 80]

【 5 Sizes M4 Hex Socket Head Cap Screws Assortment and 1 Pcs Hex Size 3.0 mm Hex Key 】

✔ Meets/Exceeds: DIN 912
✔ Screw head style: socket cap, head diameter: 7.2 mm, head height: 4.0 mm
✔ Screw drive system: internal hex drives, also known as hex socket, hex size: 3.0 mm
✔ Thread Size ( Diameter ): 4 mm, Thread pitch: 0.7 mm, Thread Length from 20 mm to 40 mm
✔ Material of screws: stainless steel 304, high strength and anti-corrosion in various conditions
✔ Includes 1 Pcs hex key , hex size: 3.0 mm, to drive these screws conveniently and easily
✔ Material of hex key: chrome-vanadium steel, nickel plated, higher strength and anti-rust
✔ Easy to store: all these screws and 1 pcs hex Key packed in a sturdy easy-use plastic storage case, organized conveniently and easily

[ M4 x 20 means : metric screws, thread size ( Diameter ): 4.0 mm, thread length 20 mm ]
[ 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