Metallics JFMB103 Screw 10-32 x 1/4 FH SL MS BR (Jar 100)

At 1/4 inch of length, the JFMB103 is a short screw meant for thin material, think a cover, plate, strap or clip landing directly on a tapped 10-32 hole. If you are stacking a device onto a mud ring, going through a plaster ring, or shimming out a device in a deep box, 1/4 inch will bottom out before it pulls tight and you need a longer 10-32 machine screw.

The JFMB103 is a brass machine screw, not plated steel. For an electrician that matters in two places: brass won't rust in damp or outdoor enclosures, and it is a conductive, non-magnetic material often specified for bonding and grounding-point hardware rather than general sheet metal fastening.

A flat head sits flush, so it is the one to use where the hole is countersunk and the fastener cannot stand proud of the surface, for example under a cover plate, a flush trim or anything a faceplate seats against. If your hole is not countersunk, a round or pan head machine screw of the same 10-32 thread seats better, because a flat head will only bear on the edge of a flat hole. The slotted drive takes a standard flat blade screwdriver, the same one already in an electrician's hand for terminal screws.

Each jar holds 100 screws. The jar pack is what you want on a service van or a parts bin, since it keeps 10-32s separated from the other threads instead of loose in a bucket.

Order Metallics part number JFMB103. That number covers the 10-32 x 1/4 inch slotted flat head brass machine screw in the 100-count jar, so it is the one to quote on a parts list rather than describing the size.