Identify the type of screw shown in figure

Explanation:

Set screws:

• Set screws are used to prevent pulleys from slipping on shafts, positioning and holding collars in place, on shafts, and holding shafts in place in assemblies.
• Headless set screws have either a slotted or socket head and are threaded to the entire length.
• Screw points are available in various styles and their recommended use.

Cap screws:

• Cap screws are used when assembly requires a stronger, more precise, and better-appearing fastener.
• A cap screw is fitted through a clearance hole in one of the pieces and screws into a threaded hole.
• A clamping action is developed by tightening the cap screws.

Socket Head Cap Screws:

• Socket Head Cap Screws are threaded fasteners with a cylindrical head and a recessed hexagon drive.
• Also known as Allen head screws, socket screws are turned by using a hexagon-shaped key and can be tightened too much higher torque specifications than a crossed recessed or slotted drive fastener.
• Socket screws are often used in applications with insufficient clearance to use a fastener with an external hexagon head.

Countersunk Screw Head:

• A countersunk screw head is characterized by its ability to rest flush with the surface into which it’s installed.
• The head essentially “sinks” into the workpiece’s surface.
• If you inspect a countersunk screw head, you’ll notice that it tapers towards the shank.
• This tapered design allows the head to dig into the workpiece’s surface.
• Screws with a countersunk head are typically used in woodworking applications.

Cheese Head Screws:

• Cheese Head Screws have a disc with a cylindrical outer edge, a height approximately half the head diameter, and a flat bearing surface.
• These screws are known for their high strength, accuracy, quality, and durability.
• These are available in stainless steel or zinc coating.

Square Head Cap Screw:

• Square head bolts are used in applications where visibility is limited but durable fastening is required.
• These bolts have large, flat sides and are easy to tighten with a wrench.
• Square heads are best used in tight or dark spaces where a machinist or fabricator must tighten the bolt blind.
• The advantage of using square head bolts is that they can be tightened with an adjustable wrench.
• Using the wrench, the square head bolts are easily tightened in close quarters where other tools cannot be used.