12-28 fasteners were fairly common in the past for electric/electronic things, pretty much dropped now, but some fastener specialty places still stock'em in limited selection of lengths/head style
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
