Machine screws, Stainless steel 18-8, 20, 4"
Machine screws, Stainless steel 18-8, 20, 4" |
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Phillips pan headPan heads are slightly rounded with short vertical sides. Phillips drive is x-shaped for installation with a Phillips screw driver. |
Spanner pan headPan heads are slightly rounded with short vertical sides. Spanner (a.k.a. snake eyes) is a tamper resistant drive that requires a special driver to install. |
Phillips flat headFlat heads are countersunk (cone shaped under the head) with a flat top. Phillips drive is x-shaped for installation with a Phillips screw driver. |
Slotted flat headFlat heads are countersunk (cone shaped under the head) with a flat top. Slotted drive has a simple slot for a flat bladed screw driver. |
Phillips oval headOval heads are countersunk (cone shaped under the head) with a rounded top. Phillips drive is x-shaped for installation with a Phillips screw driver. |
Slotted oval headOval heads are countersunk (cone shaped under the head) with a rounded top. Slotted drive has a simple slot for a flat bladed screw driver. |
Phillips truss headTruss heads are wide with a low profile rounded top. Phillips drive is x-shaped for installation with a Phillips screw driver. |
Slotted round headRound heads are domed and look like half of a sphere. Slotted drive has a simple slot for a flat bladed screw driver. |
Combo sidewalk boltSidewalk bolts have a wide, low profile head and are often used in hurricane shutter installation. Combination drive can be used with either a flat bladed or Phillips screw driver. |
See also |
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Metric machine screwsScrews with machine threads for use with a nut or in a tapped hole. |
Socket screwsScrews with an Allen wrench drive. |