Check the listing for details. GRAINGER APPROVED H1612CY Drill Bushing,Type H,Drill Size # 40 10Y943. Condition: New. Listed at 19.19 USD. Headed Press-Fit Drill Bushing (H), Standard Wall, Headed, Wire, #40 Wire size headed (H) press-fit drill bushings come in standard sizes that correspond to American Wire Gauge (AWG) sizes. The larger the wire size, the smaller the bushing. Standard-wall headed press-fit drill bushings have thicker walls and are typically sturdier than thin-wall headed press-fit bushings.Headed press-fit (H) drill bushings have an overhang, or head, that prevents them from being pushed through the drilling jig, making them ideal for applications where axial loads or vibration could move headless drill bushings. The bushings can be installed with the head projecting above the jig plate, or they can be countersunk so the head is flush with the jig plate's surface. Type H drill bushings are permanently presse.