Screw head styles the most commonly used Ever Hardware

Screw head styles is the most important thing to consider before to design a new product. Ever hardware provide a semi screw head styles for you to choose of, such of Button head/Cap head/Cheese head/Countersunk head/Fillister head/Hex head/Hex washer head/Oval head/Pan head/Round head/Truss head/Washer head etc.

Screw head styles
Head style Name Description Use
 screw head styles button head
Button head Cylindrical with a rounded top For general applications. Can be substituted in most applications for round, truss or binding heads.
 cap head
Cap head Cap head screw mostly with hexagon socket drive Socket cap screws are commonly used in machine parts, die fixturing, and clamping. The socket head enables driving where there is not sufficient space for wrenches or sockets.
 cheese head
Cheese head Disc with cylindrical outer edge, height approximately half the head diameter Cheese head can be changed to wafer head.
 countersunk head
Countersunk head Conical, with flat outer face and tapering inner face allowing it to sink into the material. The angle of the screw is measured as the full angle of the cone. Used in applications where protrusion of the fastener above the mating surface is unacceptable. Use a protrusion gage when measuring head height.
 fillister head
Fillister head The-standard fillister head has a smaller diameter than the round head. Fillister is higher with a correspondingly deeper slot.
Fillister heads can be shaved & drilled.
The smaller diameter head increases the pressure applied on the smaller area and can be assembled close to flanges and raised surfaces. Headed in counter bored dies to Insure concentricity, they may be used successfully in counter bored holes
 hex head
Hex head Have an indented top surface, six flat sides, and a flat bearing surface. Preferred in high volume assembly where pneumatic equipment is used to drive the screw. Can transmit significantly higher tightening torque levels than other head styles.
 hex washer head
Hex washer head Has an indented top surface, six flat sides with a flat washer which projects beyond the sides and provides a flat bearing surface. The washer and hex are formed together as one piece. Increased bearing surface reduces likelihood of crushing mating surfaces.
 oval head
Oval head A decorative screw head with a countersunk bottom and rounded top. Also known as “raised countersunk” (UK) Preferred over a flat head in conical applications, or when a more decorative finished look is desired. The countersunk surface nests into mating countersunk application sites.
 pan head
Pan head A low disc with a rounded, high outer edge with large surface area. For general applications. Can be substituted in most applications for round, truss or binding heads.
 round head
Round head General purpose head with high crown and deep recess but the diameter is smaller than a pan head. For general applications and where the requirement of a smaller head OD in application.
 truss head
Truss head Has a rounded top with a flat bearing surface greater in area than a round head screw of the same nominal size.
Full contour Truss heads also available.
Weaker than pan or round heads but preferred in applications where minimal clearance exists above the head. Truss profile provides a trim finished appearance.
 washer head
Washer head A washer head can be any of the above head styles (except the countersunk styles) with the addition of an integrated washer at the base of the head. This eliminates the need for a flat washer. A washer is an external or internal ridge, or rim (lip), for strength, as the washer of an iron beam such as an I-beam or a T-beam; or for attachment to another object, as the washer on the end of a pipe, steam cylinder, etc.