Hi guys these screws have gone missing and I need to buy replacement, does anyone know the name of them ? They are 1 inch in length Thanks
To me a button screw has a domed head. I’d call that a socket head cap screw though they normally have a deeper head than that. Have a look at kitchen fittings. Often a male and female with a very flat head (flatter than yours) are supplied to fix the cabinet front edges together.
They look like screws from a TV bracket or similar. Does the shape and the size of the head matter or will you get away with simply matching the thread diameter, pitch and length?
Save us all guessing what they might be called and what they might be for have a look at item number 113816363318 on eBay. Exactly what you need. You’re on your own with working the size out buts it’s going to be somewhere around M6 unless you have gigantic / miniature hands.
Threaded fasteners (AKA screws) are generally described by a) the material they are connecting; b) the shape or profile of the head; c) the type of drive head used to insert them; and d) their physical dimensions. ie. Length, shaft diameter, etc. Further differentiation comes in the form of the dimensions of the screw thread (ie. pitch) as well as the material of the screw itself (steel, brass, stainless steel, etc.) and finish: plated, painted, galvanised, anodised, etc. Also, of great importance, is the grade or property class of the fastener. Metric fasteners are graded by a system that designates it's ultimate tensile strength (in MegaPascals), the point at which the fastener will actually snap, and it's yield strength (the point where the fastener will stretch and not return to its original length.) All very technical. But for the purposes of this discussion probably irrelevant. If you're designing cylinder heads then you really oughtn't be looking here for guidance. Please see this chart for a handy reference. I'd call the threaded fasteners in the OP's picture pan-head, socket-drive machine screws. Pan: Because the head is radiused on both the top and bottom diameter. Socket-drive - because it is designed to be driven by a six-sided hex drive. And machine screw, because it is designed to be driven into a tapped metal orifice. The finish? That's a bit of a guess. As is the material class.