STAINLESS STEEL SOCKET SET SCREWS DOG POINT

Socket Set Screws Dog Point — Socket set screws with a dog point are the DIN 915 grub-screw form: headless and fully threaded, but ending in a short, parallel-sided cylindrical pilot rather than a sharp point of any kind. That pilot is designed to project into a corresponding hole or slot machined into the mating shaft, so the screw functions less like a friction or biting grip and more like a locating pin that happens to also be a threaded fastener — useful anywhere a component needs to be positioned precisely and prevented from rotating, rather than simply clamped.

Because the dog point's whole purpose depends on that matching hole or slot, it's the right choice only where the design specifically provides one; used against a plain flat shaft, it behaves like a slightly awkward flat point and gains none of its actual advantage. Typical uses include locating collars, adjustable stops, and components that need to slide axially along a slot while still being rotationally fixed by the pilot — a role none of the other three point types (cup, flat, or cone) fill in quite the same way, since they either bite into or bear against a surface rather than physically engaging a matching feature.

Grade guidance is consistent with the wider set screw family: A2 for indoor, low-corrosion assemblies, A4 for anything meeting salt, moisture, or process chemicals. As with cone point, the dog point's holding mechanism relies on positive engagement rather than surface bite, so the corrosion environment is generally the deciding factor between A2 and A4 rather than any hardness consideration around the point itself, though the pilot's small diameter does mean it carries less cross-sectional area than the parent thread, so it's worth checking it's adequately sized for the load it will actually locate against.

Sizing needs to account for the pilot as its own feature: confirm the pilot's diameter and length match the hole or slot it's meant to engage, in addition to the usual thread diameter and length checks against the tapped hub. Getting the pilot dimension wrong is the most common way this screw fails to deliver its intended benefit, even when the thread size itself is correct.

FAQs
How does a dog point differ from a cone point, and when is each the better choice?
A cone point tapers to a sharp tip that seats into a dimple, maximising rotational and axial grip in a fixed position; a dog point has a parallel-sided pilot that engages a matching hole or slot, and is the better choice specifically where sliding, repeatable location — not just maximum bite — is what the design needs.

Can a dog point set screw be used to create a sliding, adjustable stop?
Yes, where it engages a slot rather than a plain hole — the pilot can then slide along the slot's length, letting the screw act as an adjustable travel stop rather than a single fixed position.

What determines the correct pilot diameter and length for a dog point screw?
The dimensions of the hole or slot it needs to engage in the mating component, not just the parent thread size — getting the pilot's fit wrong is the most common reason this screw fails to deliver its intended locating benefit.