Metallics JFMB93 Screw 10-24 x 1 FH SL MS BR (Jar 100)

Brass. The JFMB93 is a brass machine screw, which is what you specify when you want corrosion resistance or a non-ferrous fastener, such as in damp locations or where a steel screw would rust and seize in the tapped hole. Brass is softer than steel, so seat it with a hand screwdriver rather than driving it with impact.

A flat head sits flush when it is driven into a countersunk or chamfered hole, so nothing protrudes to interfere with a plate, a bracket face or a device sitting on top. The JFMB93 is a slotted flat head, so it finishes level with the surface. If the hole is not countersunk, a pan or round head machine screw of the same 10-24 thread is the better choice because it bears on the flat surface.

One inch of 10-24 thread gives you plenty of engagement for stacking a bracket, strap or ring onto a tapped box, but in a shallow tapped hole the excess length will bottom out or protrude into the box interior. Measure your stack thickness plus about three threads of engagement; if that comes to less than an inch, order a shorter 10-24 machine screw instead of trimming this one.

Order Metallics part number JFMB93. That covers the 10-24 x 1 inch slotted flat head brass machine screw in the 100-count jar, and it is the only configuration under that number, so there is no length or finish option to specify.

It ships as a jar of 100 screws. The jar pack is what you want for truck stock or a shop bin, since you can pour out a handful and cap it again rather than dealing with a loose bag.