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What is an ISO 14587 A2 Stainless Black Oxide Torx Oval Head Tapping Screw?
ISO 14587 oval head tapping screws are metric self-tapping fasteners designed to create their own mating threads in pre-drilled holes in sheet metal, plastics, and other suitable materials. Unlike machine screws, tapping screws are not intended for use in pre-tapped machine threads or with machine thread nuts.
The oval head combines a 90° countersunk underside with a slightly raised domed top, allowing the screw to seat in a countersunk hole while leaving an attractive rounded profile above the surface.
Screw length is measured from the beginning of the countersunk undercut, where the raised oval head meets the 90° bearing surface, to the tip of the screw. The Torx (Hexalobular) drive provides superior torque transfer, reduces cam-out, and minimizes driver wear for fast, reliable installation. These screws are also known as Torx oval head sheet metal screws, raised head Torx tapping screws, six-lobe drive sheet metal screws, and oval countersunk self-tapping screws.
What material is an ISO 14587 A2 Black Oxide tapping screw made from
ISO 14587 tapping screws are manufactured from A2 stainless steel and feature a black oxide surface treatment. Unlike plated finishes, black oxide is a chemical conversion of the metal's surface, adding virtually no measurable thickness while preserving thread fit and fastener tolerances. The finish is highly abrasion resistant and will not peel, chip, or flake like conventional coatings. It also helps reduce friction during installation, minimizing the risk of galling commonly associated with stainless steel fasteners, while having no effect on the mechanical strength of the underlying A2 stainless steel.
The black oxide treatment conforms to MIL-DTL-13924, Class 4 for 300 series corrosion-resistant stainless steel and provides 96 hours of salt spray resistance in accordance with ASTM B117. For best results and to prevent contamination from carbon steel, we recommend using stainless steel installation tools.
Why choose an A2 stainless black oxide ISO 14587 Torx oval head tapping screw?
A2 stainless black oxide ISO 14587 screws combine the corrosion resistance of stainless steel with a durable, low-reflective black finish that is ideal for visible fasteners and dark-colored assemblies. The self-tapping thread forms its own mating threads during installation, reducing assembly time and eliminating the need to cut machine threads.
The Torx drive provides excellent torque transmission and reduced cam-out, while the black oxide surface treatment reduces friction and helps prevent galling without changing the dimensions or strength of the fastener. The raised oval head offers a clean, decorative appearance wherever the screw remains visible.
Where are ISO 14587 A2 Black Oxide Torx oval head tapping screws commonly used?
ISO 14587 A2 stainless black oxide Torx oval head tapping screws are widely used in electronics enclosures, automotive accessories, architectural hardware, lighting fixtures, robotics, transportation equipment, HVAC systems, machinery, control panels, marine accessories, appliance manufacturing, and general industrial assemblies.
