Value Collection 88547856 Flat Socket Cap Screw 5/16-18x1in

Product Description

The VALUE COLLECTION 88547856 is a flat socket cap screw designed for fastening applications where a flush or countersunk surface finish is required. The flat head profile sits flush with or below the mating surface when installed in a properly countersunk hole, making it well-suited for assemblies where protrusion is not acceptable. Driven by a 3/16-inch hex socket, the screw measures 1 inch in overall length with a 5/16-18 UNC thread specification and is fully threaded along that length. Manufactured from alloy steel with a black oxide finish, it offers solid mechanical strength for general industrial and mechanical fastening work.

This screw is used in light industrial, mechanical, and maintenance applications where a countersunk hex socket fastener is specified. Its fully threaded, 1-inch alloy steel construction makes it appropriate for use in metal fabrication, equipment assembly, jigs, fixtures, and machinery repair. The black oxide finish provides mild corrosion resistance and reduces light reflection, which can be useful in both functional and low-visibility installation environments. Machinists, millwrights, and maintenance technicians commonly use this fastener type in day-to-day shop and field work.

Key Features

• Flat head profile for flush or countersunk installations
• 3/16-inch hex socket drive for standard Allen key or hex bit use
• 5/16-18 UNC thread, fully threaded over 1-inch overall length
• Alloy steel construction for reliable tensile and shear strength
• Black oxide finish for mild corrosion resistance and reduced surface reflectivity

Compatibility

Designed as a standard inch-series flat socket cap screw suitable for any application calling for a 5/16-18 UNC, 1-inch overall length, fully threaded countersunk hex socket fastener.

Installation Notes

Installation requires a properly countersunk hole to achieve the intended flush seating of the flat head. Use the correct 3/16-inch hex key or driver bit and ensure the mating material is tapped or fitted with the appropriate 5/16-18 UNC thread. Follow applicable torque guidelines for the assembly material and fastener grade. Inspect threads for damage before installation and do not force the screw into misaligned or improperly sized holes.