When installing solid brass or silicon bronze screws, clamp the work together tightly, drill an undersized pilot hole (1/64 to 1/32 under), then drive a STEEL screw of the same size as the brass screw to cut threads. Remove the steel screw and install the correct screw, being careful not to over-torque it. Lubricate the screw before installation with wax or Akempucky (part #LA-0300). An alternative to pre-threading is to drill a pilot hole larger than the screw shank by 1/64 to 1/32.

	Drill Size Recommendations
		Square Drive Screws (Use Brad or Std Point Drill Bits)			Traditional Tapered “Wood Screws” (Use tapered Drill Bits)
		Pilot Drill Size			Pilot Drill Size
	Screw	Hardwoods	Softwoods	Plug Size	Hardwoods	Softwoods	Plug Size
	#4	5/64	1/16	1/4	7/64	3/32	1/4
	#6	7/64	3/32	3/8	9/64	1/8	3/8
	#8	1/8	7/64	3/8	11/64	5/32	3/8
	#10	9/64	1/8	1/2	13/64	3/16	1/2
	#12	5/32	9/64	1/2	7/32	13/64	1/2
	#14	11/64	5/32	1/2	1/4	15/64	1/2