Machine Screw

Machine screws are precision fasteners with fully threaded shanks designed to be used with pre-tapped holes or nuts. Unlike self-tapping screws, they require a pre-existing threaded hole or nut to create a secure joint. Machine screws are distinguished by their blunt tip and uniform thread, which distributes clamping force evenly and resists loosening under vibration.

Available Head Styles

Head Type	Drive Options	Description
Pan Head	Phillips, Slotted, Torx, Square	Low-profile rounded head with flat bearing surface; most common general-purpose style
Flat Head (Countersunk)	Phillips, Slotted, Torx, Square	82° countersunk head for flush mounting with a smooth, low-profile finish
Flat Head 100°	Phillips	100° countersunk angle for thinner sheet metal and aerospace applications
Undercut Flat Head	Phillips	Countersunk head with reduced head height for lower profile; provides additional thread length in limited space
Truss Head	Phillips, Slotted	Extra-wide, low-profile head with large bearing surface; ideal for soft or thin materials
Oval Head	Phillips	Modified oval countersunk head; provides decorative finished appearance with moderate flush fit
Round Head	Phillips, Slotted	Domed head that sits above workpiece; traditional style for visible applications
Cheese Head	Phillips, Slotted	Cylindrical head with flat top and straight sides; deeper head allows for larger drive recess
Hex Washer Head	Phillips, Hex, Slotted	Hex head with integral flange; provides high torque capability and eliminates need for separate washer
Phillips Square Combo Head	Phillips / Square	Dual-drive design; accepts both Phillips and square drivers for installation flexibility