920D Custom is a guitar electronics specialist based in Greenbrier, Arkansas, known for handwired wiring harnesses, loaded pickguards, control plates, and pickups built in the USA. The company takes its name from its original workshop in Building 920 on D Street and has grown from that small shop into one of the more recognized names in aftermarket guitar electronics, with products carried by major retailers including Sweetwater and American Musical Supply.

Their catalog covers upgrades for most common guitar platforms — Stratocaster, Telecaster, Jazzmaster, Les Paul, ES-style semi-hollows, and Precision and Jazz basses — as well as single coils, humbuckers, mini humbuckers, and bass pickups. A distinguishing visual signature is the orange cloth-covered pushback wire used throughout their harnesses, custom-produced for them by Gavitt Wire. All assembly and soldering is done in-house by their technicians in Arkansas.

The brand's niche is pre-assembled, drop-in upgrades aimed at players who want improved tone or custom wiring schemes without doing the soldering themselves. Offerings range from vintage-spec harnesses that replicate period-correct circuits to modified layouts with push-pull pots, blower switches, and treble bleed networks.

920D Custom has 4 products cataloged on Equipboard, including Miscellaneous Guitar Parts, Electric Basses, and Guitar Knobs.