Farmer Screw (Roofing Screw), Sandwich Panel Screw

Thread size	#10, #12, 1/4 (M4.8, M5.5, M6.3 or particular M6.5)
Length	3/4" to 12" (19 to 300mm)
Recess type	Hex Slot+Hex Torx
Head type	Indented hex washer (high head optional), Truss etc. Indented hex washer Indented hex washer (high head) Slotted Indented washer head Truss
Thread type	ASD, BSD, CSD, double threads ASD (coarse thread) BSD (general thread) CSD (fine thread) with 1 slot double threads
Point	Drill point length from #2~#4 Drill point #5 Reduced point Threaded drill point
Finish	Zinc Plated (clear / white / yellow), Coating (Geomet, Dacrotized, Ruspert etc.), Mechanically Zinc plating etc.
Standard	IFI, DIN7504, JIS, BS, AS, EN14566 or customized designs available.
Drill capacity	test steel plate thickness 1.6mm to 12mm depends on customers' requirements. #5 drill screw tested by auto-drive machine at #5 Drill Screw tested by hand driver at
Others	case harden required, assembled with steel and EPDM bonded washer (OD12mm, 12.7mm, 14mm, 16mm, 19mm, 22mm or 25mm, galvanized steel thick 0.8+/-0.1mm and black/grey EPDM thick 2.0, 2.5 or 3.0 +/-0.2mm for selection), or umbrella EPDM washer, and head painted RAL color available