#4-40 X 1/4" براغي قطع خيط من النوع F | رأس مسطح تحت القطع مع محرك فيليبس | فولاذ مطلي بالزنك ثلاثي التكافؤ (2000 / عبوة)

The flat undercut head sits flush in my aluminum panels, and the Phillips drive doesn't cam out under torque. These are exactly the right size for a tight spot where a standard screw head would interfere. Have already gone through half the bag on one project.

Finally found the right size for a small electronics project — these #4-40 screws cut their own threads without stripping, and the flat undercut head sits flush perfectly. The Phillips drive made it easy to seat them even in tight spots.

The trivalent zinc finish is a nice touch—these tiny screws don't show any rust even after sitting in a damp toolbox for a week. The flat undercut head seats flush perfectly in the thin plastic panels I'm using them on, and the phillips drive bites without stripping.