Socket Head Cap Screws M6

The 304 stainless steel construction and Allen socket drive make these screws a practical choice when you need a fastener that can be turned with a hex key and sits within a socket-head format. The listing describes a full-thread M6 screw and includes 25 pieces, which may suit a repair or a small supply of matching fasteners. There’s an important sizing conflict, though: the product name says 12mm, while the description gives a thread length of 40mm. That difference matters when clearance and fit are tight, so the exact length is not clear from the supplied details.

Best use cases

These socket head cap screws are intended for applications that call for an M6 fastener with an internal hex drive. A practical example would be keeping the screws together for a repair, then using a hex key to install one where access for a wrench around the head is limited. The listing also mentions engine replacement, but it does not identify a particular engine, component, or fitment, treat that wording as a suggested application, not confirmation that these match a specific repair.

You’ll appreciate it if you need several full-thread screws in one package and already know the dimensions your job requires. It may not suit you if you are choosing by length alone: a 12mm screw and a 40mm screw are not interchangeable just because both are described as M6.

Product specs

The product name identifies M6 x 12mm, 304 stainless steel (18-8), an Allen socket drive, full threading, and a bright finish. The package contents are listed as 25 screws. Separately, the description gives a thread size of M6-1 and a thread length of 40mm, with a head diameter of 10.22mm, head thickness of 6mm, and hex width of 5mm. The name and listed thread length do not agree, so the length should not be treated as settled from this information alone. On the spec sheet, the material and drive style are clearer than the overall fit.

Where it shines

The internal hex drive gives you a direct way to turn the fastener with a hex key, while the full-thread description points to threads running along the stated screw length. That combination is useful when your existing hardware calls for this style and size. The 25-piece count can also be convenient for a job that needs multiple matching screws, rather than buying a single replacement.

Compared with choosing a general-purpose fastener without checking its head and drive, this listing gives you a defined socket-head format and a stated material. The trade-off is that buyers who need an exact length or a confirmed engine fit need more certainty than the supplied description provides. Before relying on the 12mm name, compare the actual screw dimensions with the fastener you are replacing.

Is it worth it?

This pack makes sense if you specifically need M6 socket head cap screws, want an Allen drive, and can verify the required length independently. The stainless steel specification and 25-piece package are useful details for narrowing a choice, but they do not resolve the mismatch between 12mm in the name and 40mm in the description. If the screw has to fit a precise hole depth or clear nearby parts, that uncertainty is a real drawback, not a minor detail. Choose these only when the dimensions you need match the item you receive, for a critical repair, favor a listing with one consistent length and confirmed application details.