Dottie Partial thread cap screw has 18-8 stainless steel construction for corrosion resistance, strength and durability. This 1-1/2-Inch hex head screw has 1/4-Inch diameter, 7/16-Inch head size and 1/4-20 thread size for easy fastening. This cap screw is suitable for use in non-critical applications with nuts and washers.