We are offering our clients Flat Counter Sunk Head Elevator Bolts. Features: Square shoulder under the head Flat head flat washer, hexagonal nut Bolt head specially designed for buckets with flat wall ( holes nut recessed ) Available in UNC thread Specifications: Standard : ANSI B 18.5 Diameter : 1/4" TO 3/8" Length : 3/4" TO 5" Material : Alloy, Stainless Steel Finish : Zinc trivalent, Hexavalent, Zinc Flake, Blackening Speciality : Non Electrolyte plating like Geomet, Dacromet