
- Steel Machine Screw, Zinc Plated Finish, Flat Head, Phillips Drive, 20mm Length, M3-0.5 Metric Coarse Threads (Pack of 100)
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Amazon
From $3.60 (New)

From $3.60 (New)

| Latest | $3.60 Apr 21, '16 |
| Highest | $6.50 May 17, '15 |
| Lowest | $2.99 May 13, '14 |
| Average | $3.72 (30d avg) $3.68 (90d avg) $3.64 (180d avg) $3.94 (365d avg) $3.60 (Lifetime average) |
| Added | Nov 22, 2013 |
| Last Seen | |
| Highest | $4.49 Sep 20, '14 |
| Lowest | $2.99 May 13, '14 |
| Average | $3.52 (Overall average) |
| Added | Nov 22, 2013 |
30 day average: 83,699
90 day average: 95,045
The steel machine screw has a zinc plated finish and a flat head with a Phillips drive. Steel is often used in applications where strength is the primary consideration. The zinc plating offers corrosion resistance and a reflective appearance. The Phillips drive has an x-shaped slot that accepts a Phillips driver and is designed to allow the driver to slip out of the head to help prevent over-tightening and damage to the thread or fastener. The flat head is cone shaped for use in countersunk holes and has a flat top that fits flush with the mated surface.Machine screws are threaded fasteners that are typically used with nuts or drilled and tapped (threaded) holes. Machine screws are available with a variety of head shapes, which determine how the screw interacts with the mating surface, and drive styles, which determine the type of driver required to install and remove the screw.