Home / Screws, Nuts & Washers / Socket Screws / Socket Cap Head Screws / UNC Socket Cap Screws - ANSI B18.3 / 12.9 High Tensile Steel - UNC Socket Cap Head Screws / 4-40 UNC Socket Cap Head Screws (ANSI B18.3) - 12.9 High Tensile Steel 4-40 UNC Socket Cap Head Screws (ANSI B18.3) - 12.9 High Tensile Steel Filters: Length Excluding the Head 1" 1/2" 1/4" 3/16" 3/4" 3/8" 5/16" 5/8" 7/16" 7/8" Thread Diameter 4-40 UNC Apply filters Clear filters Sort: Most popularWhat's newPrice low to highPrice high to lowName A to ZName Z to A 10 Products Filter Sort 4-40 UNC x 3/16" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 4-40 UNC x 3/16" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 View Product Add to cart Quickview 4-40 UNC x 1/4" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.51 4-40 UNC x 1/4" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.51 View Product Add to cart Quickview 4-40 UNC x 5/16" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 4-40 UNC x 5/16" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 View Product Add to cart Quickview 4-40 UNC x 3/8" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 4-40 UNC x 3/8" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 View Product Add to cart Quickview 4-40 UNC x 7/16" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 4-40 UNC x 7/16" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 View Product Add to cart Quickview 4-40 UNC x 1/2" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 4-40 UNC x 1/2" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 View Product Add to cart Quickview 4-40 UNC x 5/8" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 4-40 UNC x 5/8" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 View Product Add to cart Quickview 4-40 UNC x 3/4" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.51 4-40 UNC x 3/4" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.51 View Product Add to cart Quickview 4-40 UNC x 7/8" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 4-40 UNC x 7/8" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 View Product Add to cart Quickview 4-40 UNC x 1" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 4-40 UNC x 1" Socket Cap Head Screws (ANSI B18.3) - High Tensile Steel 12.9 Self Colour £0.52 View Product Add to cart Quickview